612655 has 8 divisors (see below), whose sum is σ = 774000. Its totient is φ = 464256.

The previous prime is 612649. The next prime is 612671. The reversal of 612655 is 556216.

612655 = 108² + 109² + ... + 145².

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-612655 is a prime.

It is a super-2 number, since 2×612655² = 750692298050, which contains 22 as substring.

It is a plaindrome in base 9 and base 12.

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 7 ways as a sum of consecutive naturals, for example, 3130 + ... + 3319.

It is an arithmetic number, because the mean of its divisors is an integer number (96750).

2⁶¹²⁶⁵⁵ is an apocalyptic number.

612655 is a deficient number, since it is larger than the sum of its proper divisors (161345).

612655 is a wasteful number, since it uses less digits than its factorization.

612655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6473.

The product of its digits is 1800, while the sum is 25.

The square root of 612655 is about 782.7228117284. The cubic root of 612655 is about 84.9321257462.

The spelling of 612655 in words is "six hundred twelve thousand, six hundred fifty-five".