612858 has 16 divisors (see below), whose sum is σ = 1279296. Its totient is φ = 195360.

The previous prime is 612853. The next prime is 612869. The reversal of 612858 is 858216.

It is an Ulam number.

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

612858 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2083 + ... + 2358.

It is an arithmetic number, because the mean of its divisors is an integer number (79956).

2⁶¹²⁸⁵⁸ is an apocalyptic number.

612858 is an abundant number, since it is smaller than the sum of its proper divisors (666438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

612858 is a wasteful number, since it uses less digits than its factorization.

612858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4469.

The product of its digits is 3840, while the sum is 30.

The square root of 612858 is about 782.8524765242. The cubic root of 612858 is about 84.9415053142.

The spelling of 612858 in words is "six hundred twelve thousand, eight hundred fifty-eight".