612681 has 8 divisors (see below), whose sum is σ = 820704. Its totient is φ = 406560.

The previous prime is 612679. The next prime is 612713. The reversal of 612681 is 186216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 612681 - 2¹ = 612679 is a prime.

It is a super-2 number, since 2×612681² = 750756015522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 612681.

It is not an unprimeable number, because it can be changed into a prime (612611) 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, 685 + ... + 1301.

It is an arithmetic number, because the mean of its divisors is an integer number (102588).

2⁶¹²⁶⁸¹ is an apocalyptic number.

It is an amenable number.

612681 is a deficient number, since it is larger than the sum of its proper divisors (208023).

612681 is a wasteful number, since it uses less digits than its factorization.

612681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951.

The product of its digits is 576, while the sum is 24.

The square root of 612681 is about 782.7394202415. The cubic root of 612681 is about 84.9333271859.

Adding to 612681 its reverse (186216), we get a palindrome (798897).

The spelling of 612681 in words is "six hundred twelve thousand, six hundred eighty-one".