129211525 has 12 divisors (see below), whose sum is σ = 160670272. Its totient is φ = 103080240.

The previous prime is 129211519. The next prime is 129211549. The reversal of 129211525 is 525112921.

It is a de Polignac number, because none of the positive numbers 2^k-129211525 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129211493 and 129211502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2134 + ... + 16216.

Almost surely, 2^129211525 is an apocalyptic number.

It is an amenable number.

129211525 is a deficient number, since it is larger than the sum of its proper divisors (31458747).

129211525 is a wasteful number, since it uses less digits than its factorization.

129211525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14460 (or 14455 counting only the distinct ones).

The product of its digits is 1800, while the sum is 28.

The square root of 129211525 is about 11367.1247463904. The cubic root of 129211525 is about 505.5534565429.

The spelling of 129211525 in words is "one hundred twenty-nine million, two hundred eleven thousand, five hundred twenty-five".