125442761 has 2 divisors, whose sum is σ = 125442762. Its totient is φ = 125442760.

The previous prime is 125442743. The next prime is 125442763. The reversal of 125442761 is 167244521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117852736 + 7590025 = 10856^2 + 2755^2 .

It is a cyclic number.

It is not a de Polignac number, because 125442761 - 2²⁶ = 58333897 is a prime.

Together with 125442763, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125442763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62721380 + 62721381.

It is an arithmetic number, because the mean of its divisors is an integer number (62721381).

Almost surely, 2^125442761 is an apocalyptic number.

It is an amenable number.

125442761 is a deficient number, since it is larger than the sum of its proper divisors (1).

125442761 is an equidigital number, since it uses as much as digits as its factorization.

125442761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 32.

The square root of 125442761 is about 11200.1232582503. The cubic root of 125442761 is about 500.5896523469.

The spelling of 125442761 in words is "one hundred twenty-five million, four hundred forty-two thousand, seven hundred sixty-one".