125632921 has 8 divisors (see below), whose sum is σ = 132454080. Its totient is φ = 118832688.

The previous prime is 125632919. The next prime is 125632933. The reversal of 125632921 is 129236521.

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

It is not a de Polignac number, because 125632921 - 2¹ = 125632919 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125632981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7980 + ... + 17746.

It is an arithmetic number, because the mean of its divisors is an integer number (16556760).

Almost surely, 2^125632921 is an apocalyptic number.

It is an amenable number.

125632921 is a deficient number, since it is larger than the sum of its proper divisors (6821159).

125632921 is an equidigital number, since it uses as much as digits as its factorization.

125632921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10463.

The product of its digits is 6480, while the sum is 31.

The square root of 125632921 is about 11208.6092357616. The cubic root of 125632921 is about 500.8424743434.

The spelling of 125632921 in words is "one hundred twenty-five million, six hundred thirty-two thousand, nine hundred twenty-one".