612945 has 24 divisors (see below), whose sum is σ = 1086696. Its totient is φ = 319488.

The previous prime is 612929. The next prime is 612947. The reversal of 612945 is 549216.

612945 is a `hidden beast` number, since 612 + 9 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 294849 + 318096 = 543^2 + 564^2 .

It is not a de Polignac number, because 612945 - 2⁴ = 612929 is a prime.

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

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 612945.

It is not an unprimeable number, because it can be changed into a prime (612947) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2257 + ... + 2513.

It is an arithmetic number, because the mean of its divisors is an integer number (45279).

2⁶¹²⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

612945 is a deficient number, since it is larger than the sum of its proper divisors (473751).

612945 is a wasteful number, since it uses less digits than its factorization.

612945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321 (or 318 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 612945 is about 782.9080405769. The cubic root of 612945 is about 84.9455244950.

The spelling of 612945 in words is "six hundred twelve thousand, nine hundred forty-five".