125415643 has 4 divisors (see below), whose sum is σ = 125529040. Its totient is φ = 125302248.

The previous prime is 125415629. The next prime is 125415683. The reversal of 125415643 is 346514521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125415643 - 2⁵ = 125415611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125415683) 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 3 ways as a sum of consecutive naturals, for example, 55023 + ... + 57256.

It is an arithmetic number, because the mean of its divisors is an integer number (31382260).

Almost surely, 2^125415643 is an apocalyptic number.

125415643 is a deficient number, since it is larger than the sum of its proper divisors (113397).

125415643 is a wasteful number, since it uses less digits than its factorization.

125415643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113396.

The product of its digits is 14400, while the sum is 31.

The square root of 125415643 is about 11198.9125811393. The cubic root of 125415643 is about 500.5535775443.

The spelling of 125415643 in words is "one hundred twenty-five million, four hundred fifteen thousand, six hundred forty-three".