612690 has 32 divisors (see below), whose sum is σ = 1584576. Its totient is φ = 150720.

The previous prime is 612679. The next prime is 612713. The reversal of 612690 is 96216.

612690 = 6² + 7² + ... + 122².

612690 is nontrivially palindromic in base 8.

It is a super-2 number, since 2×612690² = 750778072200, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 612690.

It is a congruent number.

It is an unprimeable number.

612690 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 15 ways as a sum of consecutive naturals, for example, 396 + ... + 1175.

It is an arithmetic number, because the mean of its divisors is an integer number (49518).

2⁶¹²⁶⁹⁰ is an apocalyptic number.

612690 is an abundant number, since it is smaller than the sum of its proper divisors (971886).

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

612690 is a wasteful number, since it uses less digits than its factorization.

612690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 612690 is about 782.7451692601. The cubic root of 612690 is about 84.9337430609.

It can be divided in two parts, 6126 and 90, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 612690 in words is "six hundred twelve thousand, six hundred ninety".