612408321 has 48 divisors (see below), whose sum is σ = 1036713600. Its totient is φ = 348213600.

The previous prime is 612408319. The next prime is 612408337. The reversal of 612408321 is 123804216.

612408321 is a `hidden beast` number, since 612 + 40 + 8 + 3 + 2 + 1 = 666.

It is not a de Polignac number, because 612408321 - 2¹ = 612408319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612408301) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 873271 + ... + 873971.

It is an arithmetic number, because the mean of its divisors is an integer number (21598200).

Almost surely, 2^612408321 is an apocalyptic number.

It is an amenable number.

612408321 is a deficient number, since it is larger than the sum of its proper divisors (424305279).

612408321 is a wasteful number, since it uses less digits than its factorization.

612408321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011 (or 994 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 612408321 is about 24746.8850767122. The cubic root of 612408321 is about 849.2072521120.

The spelling of 612408321 in words is "six hundred twelve million, four hundred eight thousand, three hundred twenty-one".