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130345252 = 221091931549
BaseRepresentation
bin1111100010011…
…10100100100100
3100002021020001221
413301032210210
5231332022002
620533430124
73141626212
oct761164444
9302236057
10130345252
1167638354
123779b344
132100998b
141344dcb2
15b69ac37
hex7c4e924

130345252 has 24 divisors (see below), whose sum is σ = 231539000. Its totient is φ = 64198656.

The previous prime is 130345249. The next prime is 130345253. The reversal of 130345252 is 252543031.

It can be written as a sum of positive squares in 4 ways, for example, as 9696996 + 120648256 = 3114^2 + 10984^2 .

It is not an unprimeable number, because it can be changed into a prime (130345253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83374 + ... + 84922.

Almost surely, 2130345252 is an apocalyptic number.

It is an amenable number.

130345252 is a deficient number, since it is larger than the sum of its proper divisors (101193748).

130345252 is a wasteful number, since it uses less digits than its factorization.

130345252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855 (or 1853 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 130345252 is about 11416.8845137367. The cubic root of 130345252 is about 507.0277610206.

Adding to 130345252 its reverse (252543031), we get a palindrome (382888283).

The spelling of 130345252 in words is "one hundred thirty million, three hundred forty-five thousand, two hundred fifty-two".

Divisors: 1 2 4 109 193 218 386 436 772 1549 3098 6196 21037 42074 84148 168841 298957 337682 597914 675364 1195828 32586313 65172626 130345252