125365813 has 2 divisors, whose sum is σ = 125365814. Its totient is φ = 125365812.

The previous prime is 125365783. The next prime is 125365817. The reversal of 125365813 is 318563521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108118404 + 17247409 = 10398^2 + 4153^2 .

It is a cyclic number.

It is not a de Polignac number, because 125365813 - 2¹³ = 125357621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125365817) 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, 62682906 + 62682907.

It is an arithmetic number, because the mean of its divisors is an integer number (62682907).

Almost surely, 2^125365813 is an apocalyptic number.

It is an amenable number.

125365813 is a deficient number, since it is larger than the sum of its proper divisors (1).

125365813 is an equidigital number, since it uses as much as digits as its factorization.

125365813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 34.

The square root of 125365813 is about 11196.6875905332. The cubic root of 125365813 is about 500.4872756373.

The spelling of 125365813 in words is "one hundred twenty-five million, three hundred sixty-five thousand, eight hundred thirteen".