612646 has 16 divisors (see below), whose sum is σ = 1001376. Its totient is φ = 279936.

The previous prime is 612643. The next prime is 612649. The reversal of 612646 is 646216.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (612643) and next prime (612649).

It is a plaindrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 612646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1015 + ... + 1501.

It is an arithmetic number, because the mean of its divisors is an integer number (62586).

2⁶¹²⁶⁴⁶ is an apocalyptic number.

612646 is a deficient number, since it is larger than the sum of its proper divisors (388730).

612646 is a wasteful number, since it uses less digits than its factorization.

612646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543.

The product of its digits is 1728, while the sum is 25.

The square root of 612646 is about 782.7170625456. The cubic root of 612646 is about 84.9317098554.

The spelling of 612646 in words is "six hundred twelve thousand, six hundred forty-six".