125012505 has 16 divisors (see below), whose sum is σ = 200176704. Its totient is φ = 66621120.

The previous prime is 125012501. The next prime is 125012507. The reversal of 125012505 is 505210521.

It is not a de Polignac number, because 125012505 - 2² = 125012501 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (125012501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23722 + ... + 28508.

It is an arithmetic number, because the mean of its divisors is an integer number (12511044).

Almost surely, 2^125012505 is an apocalyptic number.

125012505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

125012505 is a deficient number, since it is larger than the sum of its proper divisors (75164199).

125012505 is a wasteful number, since it uses less digits than its factorization.

125012505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6536.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 125012505 is about 11180.8991141142. The cubic root of 125012505 is about 500.0166727774.

The spelling of 125012505 in words is "one hundred twenty-five million, twelve thousand, five hundred five".