125368421 has 16 divisors (see below), whose sum is σ = 138639600. Its totient is φ = 112831488.

The previous prime is 125368417. The next prime is 125368427. The reversal of 125368421 is 124863521.

It can be written as a sum of positive squares in 8 ways, for example, as 4060225 + 121308196 = 2015^2 + 11014^2 .

It is a cyclic number.

It is not a de Polignac number, because 125368421 - 2² = 125368417 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 (125368427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52571 + ... + 54903.

It is an arithmetic number, because the mean of its divisors is an integer number (8664975).

Almost surely, 2^125368421 is an apocalyptic number.

It is an amenable number.

125368421 is a deficient number, since it is larger than the sum of its proper divisors (13271179).

125368421 is a wasteful number, since it uses less digits than its factorization.

125368421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2488.

The product of its digits is 11520, while the sum is 32.

The square root of 125368421 is about 11196.8040529430. The cubic root of 125368421 is about 500.4907461788.

The spelling of 125368421 in words is "one hundred twenty-five million, three hundred sixty-eight thousand, four hundred twenty-one".