612866 has 8 divisors (see below), whose sum is σ = 924924. Its totient is φ = 304560.

The previous prime is 612853. The next prime is 612869. The reversal of 612866 is 668216.

It can be written as a sum of positive squares in 2 ways, for example, as 519841 + 93025 = 721^2 + 305^2 .

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

It is not an unprimeable number, because it can be changed into a prime (612869) by changing a digit.

612866 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485 + ... + 1208.

2⁶¹²⁸⁶⁶ is an apocalyptic number.

612866 is a deficient number, since it is larger than the sum of its proper divisors (312058).

612866 is a wasteful number, since it uses less digits than its factorization.

612866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876.

The product of its digits is 3456, while the sum is 29.

The square root of 612866 is about 782.8575860270. The cubic root of 612866 is about 84.9418749099.

The spelling of 612866 in words is "six hundred twelve thousand, eight hundred sixty-six".