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130530625 = 544572
BaseRepresentation
bin1111100011110…
…11110101000001
3100002121122100121
413301323311001
5231403440000
620541420241
73143330521
oct761736501
9302548317
10130530625
1167754655
123786a681
1321073174
141349b681
15b6d5b1a
hex7c7bd41

130530625 has 15 divisors (see below), whose sum is σ = 163468767. Its totient is φ = 104196000.

The previous prime is 130530623. The next prime is 130530649. The reversal of 130530625 is 526035031.

It is a happy number.

The square root of 130530625 is 11425.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 7 ways, for example, as 49098049 + 81432576 = 7007^2 + 9024^2 .

It is not a de Polignac number, because 130530625 - 21 = 130530623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 130530625.

It is not an unprimeable number, because it can be changed into a prime (130530623) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 285397 + ... + 285853.

Almost surely, 2130530625 is an apocalyptic number.

130530625 is the 11425-th square number.

130530625 is the 5713-rd centered octagonal number.

It is an amenable number.

130530625 is a deficient number, since it is larger than the sum of its proper divisors (32938142).

130530625 is an frugal number, since it uses more digits than its factorization.

130530625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 25.

The cubic root of 130530625 is about 507.2680069180.

Multiplying 130530625 by its sum of digits (25), we get a square (3263265625 = 571252).

130530625 divided by its sum of digits (25) gives a palindrome (5221225).

Adding to 130530625 its reverse (526035031), we get a palindrome (656565656).

The spelling of 130530625 in words is "one hundred thirty million, five hundred thirty thousand, six hundred twenty-five".

Divisors: 1 5 25 125 457 625 2285 11425 57125 208849 285625 1044245 5221225 26106125 130530625