612921 has 8 divisors (see below), whose sum is σ = 860320. Its totient is φ = 387072.

The previous prime is 612889. The next prime is 612923. The reversal of 612921 is 129216.

612921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 612921 - 2⁵ = 612889 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 612921.

It is not an unprimeable number, because it can be changed into a prime (612923) 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, 5320 + ... + 5433.

It is an arithmetic number, because the mean of its divisors is an integer number (107540).

2⁶¹²⁹²¹ is an apocalyptic number.

It is an amenable number.

612921 is a deficient number, since it is larger than the sum of its proper divisors (247399).

612921 is a wasteful number, since it uses less digits than its factorization.

612921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10775.

The product of its digits is 216, while the sum is 21.

The square root of 612921 is about 782.8927129563. The cubic root of 612921 is about 84.9444157934.

The spelling of 612921 in words is "six hundred twelve thousand, nine hundred twenty-one".