125603394131 has 2 divisors, whose sum is σ = 125603394132. Its totient is φ = 125603394130.

The previous prime is 125603394083. The next prime is 125603394143. The reversal of 125603394131 is 131493306521.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125603394131 - 2¹⁰ = 125603393107 is a prime.

It is a super-2 number, since 2×125603394131² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (125603394331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62801697065 + 62801697066.

It is an arithmetic number, because the mean of its divisors is an integer number (62801697066).

Almost surely, 2^125603394131 is an apocalyptic number.

125603394131 is a deficient number, since it is larger than the sum of its proper divisors (1).

125603394131 is an equidigital number, since it uses as much as digits as its factorization.

125603394131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 38.

The spelling of 125603394131 in words is "one hundred twenty-five billion, six hundred three million, three hundred ninety-four thousand, one hundred thirty-one".