129698925 has 24 divisors (see below), whose sum is σ = 215655840. Its totient is φ = 68779200.

The previous prime is 129698911. The next prime is 129698927. The reversal of 129698925 is 529896921.

It is not a de Polignac number, because 129698925 - 2⁵ = 129698893 is a prime.

It is a super-2 number, since 2×129698925² = 33643622292311250, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129698927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8595 + ... + 18255.

It is an arithmetic number, because the mean of its divisors is an integer number (8985660).

Almost surely, 2^129698925 is an apocalyptic number.

129698925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129698925 is a deficient number, since it is larger than the sum of its proper divisors (85956915).

129698925 is a wasteful number, since it uses less digits than its factorization.

129698925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9853 (or 9848 counting only the distinct ones).

The product of its digits is 699840, while the sum is 51.

The square root of 129698925 is about 11388.5435855512. The cubic root of 129698925 is about 506.1883265824.

The spelling of 129698925 in words is "one hundred twenty-nine million, six hundred ninety-eight thousand, nine hundred twenty-five".