125521730 has 32 divisors (see below), whose sum is σ = 234045504. Its totient is φ = 48436416.

The previous prime is 125521699. The next prime is 125521769. The reversal of 125521730 is 37125521.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 125521730.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33932 + ... + 37448.

It is an arithmetic number, because the mean of its divisors is an integer number (7313922).

Almost surely, 2^125521730 is an apocalyptic number.

125521730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125521730 is a deficient number, since it is larger than the sum of its proper divisors (108523774).

125521730 is a wasteful number, since it uses less digits than its factorization.

125521730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3650.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 125521730 is about 11203.6480665897. The cubic root of 125521730 is about 500.6946744080.

The spelling of 125521730 in words is "one hundred twenty-five million, five hundred twenty-one thousand, seven hundred thirty".