125555515 has 8 divisors (see below), whose sum is σ = 158596560. Its totient is φ = 95157792.

The previous prime is 125555501. The next prime is 125555519. The reversal of 125555515 is 515555521.

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

It is a cyclic number.

It is not a de Polignac number, because 125555515 - 2⁵ = 125555483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125555519) 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, 660724 + ... + 660913.

It is an arithmetic number, because the mean of its divisors is an integer number (19824570).

Almost surely, 2^125555515 is an apocalyptic number.

125555515 is a deficient number, since it is larger than the sum of its proper divisors (33041045).

125555515 is a wasteful number, since it uses less digits than its factorization.

125555515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321661.

The product of its digits is 31250, while the sum is 34.

The square root of 125555515 is about 11205.1557329651. The cubic root of 125555515 is about 500.7395921342.

The spelling of 125555515 in words is "one hundred twenty-five million, five hundred fifty-five thousand, five hundred fifteen".