125021523 has 16 divisors (see below), whose sum is σ = 188121600. Its totient is φ = 73157280.

The previous prime is 125021473. The next prime is 125021527. The reversal of 125021523 is 325120521.

It is not a de Polignac number, because 125021523 - 2¹² = 125017427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125021523.

It is not an unprimeable number, because it can be changed into a prime (125021527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64363 + ... + 66276.

It is an arithmetic number, because the mean of its divisors is an integer number (11757600).

Almost surely, 2^125021523 is an apocalyptic number.

125021523 is a deficient number, since it is larger than the sum of its proper divisors (63100077).

125021523 is a wasteful number, since it uses less digits than its factorization.

125021523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130682.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 125021523 is about 11181.3023838907. The cubic root of 125021523 is about 500.0286956864.

The spelling of 125021523 in words is "one hundred twenty-five million, twenty-one thousand, five hundred twenty-three".