125912919 has 16 divisors (see below), whose sum is σ = 183441024. Its totient is φ = 76188000.

The previous prime is 125912911. The next prime is 125912921. The reversal of 125912919 is 919219521.

It is not a de Polignac number, because 125912919 - 2³ = 125912911 is a prime.

It is a super-2 number, since 2×125912919² = 31708126342201122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125912911) 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, 20412 + ... + 25854.

It is an arithmetic number, because the mean of its divisors is an integer number (11465064).

Almost surely, 2^125912919 is an apocalyptic number.

125912919 is a deficient number, since it is larger than the sum of its proper divisors (57528105).

125912919 is a wasteful number, since it uses less digits than its factorization.

125912919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6158.

The product of its digits is 14580, while the sum is 39.

The square root of 125912919 is about 11221.0925938609. The cubic root of 125912919 is about 501.2142740233.

The spelling of 125912919 in words is "one hundred twenty-five million, nine hundred twelve thousand, nine hundred nineteen".