312421491 has 6 divisors (see below), whose sum is σ = 451275500. Its totient is φ = 208280988.

The previous prime is 312421453. The next prime is 312421511. The reversal of 312421491 is 194124213.

It is a happy number.

It is not a de Polignac number, because 312421491 - 2⁷ = 312421363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312421391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17356741 + ... + 17356758.

Almost surely, 2^312421491 is an apocalyptic number.

312421491 is a deficient number, since it is larger than the sum of its proper divisors (138854009).

312421491 is a wasteful number, since it uses less digits than its factorization.

312421491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34713505 (or 34713502 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 312421491 is about 17675.4488203270. The cubic root of 312421491 is about 678.5475710657.

The spelling of 312421491 in words is "three hundred twelve million, four hundred twenty-one thousand, four hundred ninety-one".