125665951 has 8 divisors (see below), whose sum is σ = 131336064. Its totient is φ = 120013080.

The previous prime is 125665933. The next prime is 125665957. The reversal of 125665951 is 159566521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125665951 - 2⁵ = 125665919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125665957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11940 + ... + 19846.

It is an arithmetic number, because the mean of its divisors is an integer number (16417008).

Almost surely, 2^125665951 is an apocalyptic number.

125665951 is a deficient number, since it is larger than the sum of its proper divisors (5670113).

125665951 is an equidigital number, since it uses as much as digits as its factorization.

125665951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8621.

The product of its digits is 81000, while the sum is 40.

The square root of 125665951 is about 11210.0825599101. The cubic root of 125665951 is about 500.8863624614.

The spelling of 125665951 in words is "one hundred twenty-five million, six hundred sixty-five thousand, nine hundred fifty-one".