125915 has 4 divisors (see below), whose sum is σ = 151104. Its totient is φ = 100728.

The previous prime is 125899. The next prime is 125921. The reversal of 125915 is 519521.

125915 = T₁₂₂ + T₁₂₃ + ... + T₁₃₆.

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 125915 - 2⁴ = 125899 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 125915.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 12587 + ... + 12596.

It is an arithmetic number, because the mean of its divisors is an integer number (37776).

2¹²⁵⁹¹⁵ is an apocalyptic number.

125915 is a deficient number, since it is larger than the sum of its proper divisors (25189).

125915 is an equidigital number, since it uses as much as digits as its factorization.

125915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25188.

The product of its digits is 450, while the sum is 23.

The square root of 125915 is about 354.8450366005. The cubic root of 125915 is about 50.1217035247.

The spelling of 125915 in words is "one hundred twenty-five thousand, nine hundred fifteen".