125405615 has 4 divisors (see below), whose sum is σ = 150486744. Its totient is φ = 100324488.

The previous prime is 125405603. The next prime is 125405629. The reversal of 125405615 is 516504521.

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 125405615 - 2⁸ = 125405359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 12540557 + ... + 12540566.

It is an arithmetic number, because the mean of its divisors is an integer number (37621686).

Almost surely, 2^125405615 is an apocalyptic number.

125405615 is a deficient number, since it is larger than the sum of its proper divisors (25081129).

125405615 is an equidigital number, since it uses as much as digits as its factorization.

125405615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25081128.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 125405615 is about 11198.4648501480. The cubic root of 125405615 is about 500.5402360797.

The spelling of 125405615 in words is "one hundred twenty-five million, four hundred five thousand, six hundred fifteen".