125917215 has 16 divisors (see below), whose sum is σ = 213319008. Its totient is φ = 63205376.

The previous prime is 125917193. The next prime is 125917219. The reversal of 125917215 is 512719521.

It is a cyclic number.

It is not a de Polignac number, because 125917215 - 2¹² = 125913119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125917219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246642 + ... + 247151.

It is an arithmetic number, because the mean of its divisors is an integer number (13332438).

Almost surely, 2^125917215 is an apocalyptic number.

125917215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125917215 is a deficient number, since it is larger than the sum of its proper divisors (87401793).

125917215 is a wasteful number, since it uses less digits than its factorization.

125917215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493818.

The product of its digits is 6300, while the sum is 33.

The square root of 125917215 is about 11221.2840174376. The cubic root of 125917215 is about 501.2199742381.

The spelling of 125917215 in words is "one hundred twenty-five million, nine hundred seventeen thousand, two hundred fifteen".