125315579 has 2 divisors, whose sum is σ = 125315580. Its totient is φ = 125315578.

The previous prime is 125315543. The next prime is 125315611. The reversal of 125315579 is 975513521.

It is a strong prime.

It is an emirp because it is prime and its reverse (975513521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125315579 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125315539) 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 as a sum of consecutive naturals, namely, 62657789 + 62657790.

It is an arithmetic number, because the mean of its divisors is an integer number (62657790).

Almost surely, 2^125315579 is an apocalyptic number.

125315579 is a deficient number, since it is larger than the sum of its proper divisors (1).

125315579 is an equidigital number, since it uses as much as digits as its factorization.

125315579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47250, while the sum is 38.

The square root of 125315579 is about 11194.4441130411. Note that the first 3 decimals coincide. The cubic root of 125315579 is about 500.4204183977.

The spelling of 125315579 in words is "one hundred twenty-five million, three hundred fifteen thousand, five hundred seventy-nine".