125413991 has 2 divisors, whose sum is σ = 125413992. Its totient is φ = 125413990.

The previous prime is 125413973. The next prime is 125414021. The reversal of 125413991 is 199314521.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125413991 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125413901) 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, 62706995 + 62706996.

It is an arithmetic number, because the mean of its divisors is an integer number (62706996).

Almost surely, 2^125413991 is an apocalyptic number.

125413991 is a deficient number, since it is larger than the sum of its proper divisors (1).

125413991 is an equidigital number, since it uses as much as digits as its factorization.

125413991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 35.

The square root of 125413991 is about 11198.8388237353. The cubic root of 125413991 is about 500.5513797373.

The spelling of 125413991 in words is "one hundred twenty-five million, four hundred thirteen thousand, nine hundred ninety-one".