129490625 has 24 divisors (see below), whose sum is σ = 176613696. Its totient is φ = 94150000.

The previous prime is 129490609. The next prime is 129490657. The reversal of 129490625 is 526094921.

It is not a de Polignac number, because 129490625 - 2⁴ = 129490609 is a prime.

It is a Duffinian number.

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, 32492 + ... + 36258.

It is an arithmetic number, because the mean of its divisors is an integer number (7358904).

Almost surely, 2^129490625 is an apocalyptic number.

It is an amenable number.

129490625 is a deficient number, since it is larger than the sum of its proper divisors (47123071).

129490625 is an frugal number, since it uses more digits than its factorization.

129490625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3803 (or 3783 counting only the distinct ones).

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

The square root of 129490625 is about 11379.3947554341. The cubic root of 129490625 is about 505.9171973117.

It can be divided in two parts, 1294 and 90625, that added together give a palindrome (91919).

The spelling of 129490625 in words is "one hundred twenty-nine million, four hundred ninety thousand, six hundred twenty-five".