612856 has 8 divisors (see below), whose sum is σ = 1149120. Its totient is φ = 306424.

The previous prime is 612853. The next prime is 612869. The reversal of 612856 is 658216.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38296 + ... + 38311.

It is an arithmetic number, because the mean of its divisors is an integer number (143640).

2⁶¹²⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

612856 is a deficient number, since it is larger than the sum of its proper divisors (536264).

612856 is a wasteful number, since it uses less digits than its factorization.

612856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76613 (or 76609 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 612856 is about 782.8511991432. The cubic root of 612856 is about 84.9414129148.

The spelling of 612856 in words is "six hundred twelve thousand, eight hundred fifty-six".