125129502 has 32 divisors (see below), whose sum is σ = 283318560. Its totient is φ = 40921920.

The previous prime is 125129491. The next prime is 125129507. The reversal of 125129502 is 205921521.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125129507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18999 + ... + 24722.

It is an arithmetic number, because the mean of its divisors is an integer number (8853705).

Almost surely, 2^125129502 is an apocalyptic number.

125129502 is an abundant number, since it is smaller than the sum of its proper divisors (158189058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125129502 is a wasteful number, since it uses less digits than its factorization.

125129502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43785 (or 43779 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 125129502 is about 11186.1298937568. The cubic root of 125129502 is about 500.1726097382.

The spelling of 125129502 in words is "one hundred twenty-five million, one hundred twenty-nine thousand, five hundred two".