312404561 has 8 divisors (see below), whose sum is σ = 372557184. Its totient is φ = 256132800.

The previous prime is 312404557. The next prime is 312404567. The reversal of 312404561 is 165404213.

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

It is not a de Polignac number, because 312404561 - 2² = 312404557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312404561.

It is not an unprimeable number, because it can be changed into a prime (312404567) 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, 970040 + ... + 970361.

It is an arithmetic number, because the mean of its divisors is an integer number (46569648).

Almost surely, 2^312404561 is an apocalyptic number.

It is an amenable number.

312404561 is a deficient number, since it is larger than the sum of its proper divisors (60152623).

312404561 is a wasteful number, since it uses less digits than its factorization.

312404561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940431.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 312404561 is about 17674.9699009645. The cubic root of 312404561 is about 678.5353141007.

Adding to 312404561 its reverse (165404213), we get a palindrome (477808774).

The spelling of 312404561 in words is "three hundred twelve million, four hundred four thousand, five hundred sixty-one".