125437761 has 8 divisors (see below), whose sum is σ = 185833760. Its totient is φ = 83625156.

The previous prime is 125437729. The next prime is 125437771. The reversal of 125437761 is 167734521.

It is a happy number.

It is not a de Polignac number, because 125437761 - 2⁵ = 125437729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125437721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2322895 + ... + 2322948.

It is an arithmetic number, because the mean of its divisors is an integer number (23229220).

Almost surely, 2^125437761 is an apocalyptic number.

It is an amenable number.

125437761 is a deficient number, since it is larger than the sum of its proper divisors (60395999).

125437761 is an equidigital number, since it uses as much as digits as its factorization.

125437761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4645852 (or 4645846 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 125437761 is about 11199.9000441968. The cubic root of 125437761 is about 500.5830012881.

The spelling of 125437761 in words is "one hundred twenty-five million, four hundred thirty-seven thousand, seven hundred sixty-one".