612985 has 4 divisors (see below), whose sum is σ = 735588. Its totient is φ = 490384.

The previous prime is 612977. The next prime is 613007. The reversal of 612985 is 589216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71289 + 541696 = 267^2 + 736^2 .

It is a cyclic number.

It is not a de Polignac number, because 612985 - 2³ = 612977 is a prime.

It is a super-2 number, since 2×612985² = 751501220450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

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

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 61294 + ... + 61303.

It is an arithmetic number, because the mean of its divisors is an integer number (183897).

2⁶¹²⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

612985 is a deficient number, since it is larger than the sum of its proper divisors (122603).

612985 is a wasteful number, since it uses less digits than its factorization.

612985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122602.

The product of its digits is 4320, while the sum is 31.

The square root of 612985 is about 782.9335859446. The cubic root of 612985 is about 84.9473722666.

The spelling of 612985 in words is "six hundred twelve thousand, nine hundred eighty-five".