125518979 has 2 divisors, whose sum is σ = 125518980. Its totient is φ = 125518978.

The previous prime is 125518951. The next prime is 125519011. The reversal of 125518979 is 979815521.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (979815521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125518979 - 2¹⁶ = 125453443 is a prime.

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, 62759489 + 62759490.

It is an arithmetic number, because the mean of its divisors is an integer number (62759490).

Almost surely, 2^125518979 is an apocalyptic number.

125518979 is a deficient number, since it is larger than the sum of its proper divisors (1).

125518979 is an equidigital number, since it uses as much as digits as its factorization.

125518979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 47.

The square root of 125518979 is about 11203.5252934065. The cubic root of 125518979 is about 500.6910165523.

The spelling of 125518979 in words is "one hundred twenty-five million, five hundred eighteen thousand, nine hundred seventy-nine".