312305421 has 16 divisors (see below), whose sum is σ = 424347840. Its totient is φ = 204251520.

The previous prime is 312305359. The next prime is 312305423. The reversal of 312305421 is 124503213.

It is not a de Polignac number, because 312305421 - 2¹³ = 312297229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312305423) 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, 74641 + ... + 78713.

It is an arithmetic number, because the mean of its divisors is an integer number (26521740).

Almost surely, 2^312305421 is an apocalyptic number.

It is an amenable number.

312305421 is a deficient number, since it is larger than the sum of its proper divisors (112042419).

312305421 is a wasteful number, since it uses less digits than its factorization.

312305421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4556.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 312305421 is about 17672.1651474855. The cubic root of 312305421 is about 678.4635299287.

Adding to 312305421 its reverse (124503213), we get a palindrome (436808634).

The spelling of 312305421 in words is "three hundred twelve million, three hundred five thousand, four hundred twenty-one".