312442421 has 8 divisors (see below), whose sum is σ = 318087000. Its totient is φ = 306845440.

The previous prime is 312442391. The next prime is 312442457. The reversal of 312442421 is 124244213.

It can be written as a sum of positive squares in 4 ways, for example, as 6682225 + 305760196 = 2585^2 + 17486^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 312442421 - 2⁶ = 312442357 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 (312442021) 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, 1481 + ... + 25041.

It is an arithmetic number, because the mean of its divisors is an integer number (39760875).

Almost surely, 2^312442421 is an apocalyptic number.

It is an amenable number.

312442421 is a deficient number, since it is larger than the sum of its proper divisors (5644579).

312442421 is a wasteful number, since it uses less digits than its factorization.

312442421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23799.

The product of its digits is 1536, while the sum is 23.

The square root of 312442421 is about 17676.0408745850. The cubic root of 312442421 is about 678.5627233348.

Adding to 312442421 its reverse (124244213), we get a palindrome (436686634).

The spelling of 312442421 in words is "three hundred twelve million, four hundred forty-two thousand, four hundred twenty-one".