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25452025 = 5210092
BaseRepresentation
bin110000100010…
…1110111111001
31202220002121121
41201011313321
523003431100
62305305241
7426224104
oct141056771
952802547
1025452025
1113404535
128635221
135371b91
14354773b
15237b51a
hex1845df9

25452025 has 9 divisors (see below), whose sum is σ = 31591821. Its totient is φ = 20341440.

The previous prime is 25452019. The next prime is 25452029. The reversal of 25452025 is 52025452.

It is a happy number.

The square root of 25452025 is 5045.

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

It can be written as a sum of positive squares in 4 ways, for example, as 2832489 + 22619536 = 1683^2 + 4756^2 .

It is not a de Polignac number, because 25452025 - 23 = 25452017 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 not an unprimeable number, because it can be changed into a prime (25452029) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 24721 + ... + 25729.

Almost surely, 225452025 is an apocalyptic number.

25452025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25452025 is the 5045-th square number.

25452025 is the 2523-rd centered octagonal number.

It is an amenable number.

25452025 is a deficient number, since it is larger than the sum of its proper divisors (6139796).

25452025 is an frugal number, since it uses more digits than its factorization.

25452025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2028 (or 1014 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The cubic root of 25452025 is about 294.1535633198.

Multiplying 25452025 by its sum of digits (25), we get a square (636300625 = 252252).

25452025 divided by its sum of digits (25) gives a square (1018081 = 10092).

Adding to 25452025 its reverse (52025452), we get a palindrome (77477477).

The spelling of 25452025 in words is "twenty-five million, four hundred fifty-two thousand, twenty-five".

Divisors: 1 5 25 1009 5045 25225 1018081 5090405 25452025