125402565 has 16 divisors (see below), whose sum is σ = 211204800. Its totient is φ = 63361152.

The previous prime is 125402561. The next prime is 125402579. The reversal of 125402565 is 565204521.

It is not a de Polignac number, because 125402565 - 2² = 125402561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125402561) 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, 219720 + ... + 220289.

It is an arithmetic number, because the mean of its divisors is an integer number (13200300).

Almost surely, 2^125402565 is an apocalyptic number.

125402565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125402565 is a deficient number, since it is larger than the sum of its proper divisors (85802235).

125402565 is a wasteful number, since it uses less digits than its factorization.

125402565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440036.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 125402565 is about 11198.3286699400. The cubic root of 125402565 is about 500.5361781538.

The spelling of 125402565 in words is "one hundred twenty-five million, four hundred two thousand, five hundred sixty-five".