125931761 has 2 divisors, whose sum is σ = 125931762. Its totient is φ = 125931760.

The previous prime is 125931727. The next prime is 125931779. The reversal of 125931761 is 167139521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78872161 + 47059600 = 8881^2 + 6860^2 .

It is a cyclic number.

It is not a de Polignac number, because 125931761 - 2¹⁸ = 125669617 is a prime.

It is a super-2 number, since 2×125931761² = 31717616857122242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (125931721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62965880 + 62965881.

It is an arithmetic number, because the mean of its divisors is an integer number (62965881).

Almost surely, 2^125931761 is an apocalyptic number.

It is an amenable number.

125931761 is a deficient number, since it is larger than the sum of its proper divisors (1).

125931761 is an equidigital number, since it uses as much as digits as its factorization.

125931761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 35.

The square root of 125931761 is about 11221.9321420155. The cubic root of 125931761 is about 501.2392738629.

The spelling of 125931761 in words is "one hundred twenty-five million, nine hundred thirty-one thousand, seven hundred sixty-one".