125518919 has 2 divisors, whose sum is σ = 125518920. Its totient is φ = 125518918.

The previous prime is 125518909. The next prime is 125518937. The reversal of 125518919 is 919815521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125518919 - 2²⁰ = 124470343 is a prime.

It is a super-2 number, since 2×125518919² = 31509998053857122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125518909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62759459 + 62759460.

It is an arithmetic number, because the mean of its divisors is an integer number (62759460).

Almost surely, 2^125518919 is an apocalyptic number.

125518919 is a deficient number, since it is larger than the sum of its proper divisors (1).

125518919 is an equidigital number, since it uses as much as digits as its factorization.

125518919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 41.

The square root of 125518919 is about 11203.5226156776. The cubic root of 125518919 is about 500.6909367730.

The spelling of 125518919 in words is "one hundred twenty-five million, five hundred eighteen thousand, nine hundred nineteen".