129290025 has 24 divisors (see below), whose sum is σ = 219541504. Its totient is φ = 67089600.

The previous prime is 129290017. The next prime is 129290047. The reversal of 129290025 is 520092921.

It is not a de Polignac number, because 129290025 - 2³ = 129290017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129289974 and 129290001.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20521 + ... + 26070.

Almost surely, 2^129290025 is an apocalyptic number.

129290025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129290025 is a deficient number, since it is larger than the sum of its proper divisors (90251479).

129290025 is a wasteful number, since it uses less digits than its factorization.

129290025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46641 (or 46636 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 129290025 is about 11370.5771621321. The cubic root of 129290025 is about 505.6558156068.

The spelling of 129290025 in words is "one hundred twenty-nine million, two hundred ninety thousand, twenty-five".