125081919 has 12 divisors (see below), whose sum is σ = 182098176. Its totient is φ = 82730592.

The previous prime is 125081911. The next prime is 125081933. The reversal of 125081919 is 919180521.

It is not a de Polignac number, because 125081919 - 2³ = 125081911 is a prime.

It is a super-2 number, since 2×125081919² = 31290972921445122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125081911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53574 + ... + 55859.

It is an arithmetic number, because the mean of its divisors is an integer number (15174848).

Almost surely, 2^125081919 is an apocalyptic number.

125081919 is a deficient number, since it is larger than the sum of its proper divisors (57016257).

125081919 is a wasteful number, since it uses less digits than its factorization.

125081919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109566 (or 109563 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 36.

The square root of 125081919 is about 11184.0028165233. The cubic root of 125081919 is about 500.1092014817.

The spelling of 125081919 in words is "one hundred twenty-five million, eighty-one thousand, nine hundred nineteen".