125312421 has 8 divisors (see below), whose sum is σ = 179935840. Its totient is φ = 77115312.

The previous prime is 125312413. The next prime is 125312431. The reversal of 125312421 is 124213521.

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

It is not a de Polignac number, because 125312421 - 2³ = 125312413 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 (125312431) 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, 1606531 + ... + 1606608.

It is an arithmetic number, because the mean of its divisors is an integer number (22491980).

Almost surely, 2^125312421 is an apocalyptic number.

It is an amenable number.

125312421 is a deficient number, since it is larger than the sum of its proper divisors (54623419).

125312421 is a wasteful number, since it uses less digits than its factorization.

125312421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3213155.

The product of its digits is 480, while the sum is 21.

The square root of 125312421 is about 11194.3030600391. The cubic root of 125312421 is about 500.4162147677.

Adding to 125312421 its reverse (124213521), we get a palindrome (249525942).

The spelling of 125312421 in words is "one hundred twenty-five million, three hundred twelve thousand, four hundred twenty-one".