129252926 has 24 divisors (see below), whose sum is σ = 218080632. Its totient is φ = 57380400.

The previous prime is 129252917. The next prime is 129252931. The reversal of 129252926 is 629252921.

It is a super-2 number, since 2×129252926² = 33412637759122952, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129252926.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4196 + ... + 16616.

It is an arithmetic number, because the mean of its divisors is an integer number (9086693).

Almost surely, 2^129252926 is an apocalyptic number.

129252926 is a deficient number, since it is larger than the sum of its proper divisors (88827706).

129252926 is a wasteful number, since it uses less digits than its factorization.

129252926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12488 (or 12477 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 129252926 is about 11368.9456855066. The cubic root of 129252926 is about 505.6074460086.

It can be divided in two parts, 12925 and 2926, that added together give a palindrome (15851).

The spelling of 129252926 in words is "one hundred twenty-nine million, two hundred fifty-two thousand, nine hundred twenty-six".