129197025 has 96 divisors (see below), whose sum is σ = 256233600. Its totient is φ = 64385280.

The previous prime is 129197023. The next prime is 129197039. The reversal of 129197025 is 520791921.

It is not a de Polignac number, because 129197025 - 2¹ = 129197023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129197021) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 929406 + ... + 929544.

It is an arithmetic number, because the mean of its divisors is an integer number (2669100).

Almost surely, 2^129197025 is an apocalyptic number.

129197025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129197025 is a deficient number, since it is larger than the sum of its proper divisors (127036575).

129197025 is an equidigital number, since it uses as much as digits as its factorization.

129197025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 129197025 is about 11366.4869242876. The cubic root of 129197025 is about 505.5345449188.

The spelling of 129197025 in words is "one hundred twenty-nine million, one hundred ninety-seven thousand, twenty-five".