125783131 has 2 divisors, whose sum is σ = 125783132. Its totient is φ = 125783130.

The previous prime is 125783111. The next prime is 125783137. The reversal of 125783131 is 131387521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125783131 - 2⁷ = 125783003 is a prime.

It is a super-2 number, since 2×125783131² = 31642792088326322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 125783093 and 125783102.

It is not a weakly prime, because it can be changed into another prime (125783137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62891565 + 62891566.

It is an arithmetic number, because the mean of its divisors is an integer number (62891566).

Almost surely, 2^125783131 is an apocalyptic number.

125783131 is a deficient number, since it is larger than the sum of its proper divisors (1).

125783131 is an equidigital number, since it uses as much as digits as its factorization.

125783131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 31.

The square root of 125783131 is about 11215.3078869909. The cubic root of 125783131 is about 501.0420016234.

The spelling of 125783131 in words is "one hundred twenty-five million, seven hundred eighty-three thousand, one hundred thirty-one".