125664015 has 8 divisors (see below), whose sum is σ = 201062448. Its totient is φ = 67020800.

The previous prime is 125664013. The next prime is 125664031. The reversal of 125664015 is 510466521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125664015 - 2¹ = 125664013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125664013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4188786 + ... + 4188815.

It is an arithmetic number, because the mean of its divisors is an integer number (25132806).

Almost surely, 2^125664015 is an apocalyptic number.

125664015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

125664015 is a deficient number, since it is larger than the sum of its proper divisors (75398433).

125664015 is an equidigital number, since it uses as much as digits as its factorization.

125664015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8377609.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 125664015 is about 11209.9962087416. The cubic root of 125664015 is about 500.8837902425.

The spelling of 125664015 in words is "one hundred twenty-five million, six hundred sixty-four thousand, fifteen".