622855 has 8 divisors (see below), whose sum is σ = 765072. Its totient is φ = 486528.

The previous prime is 622849. The next prime is 622861. The reversal of 622855 is 558226.

It is an interprime number because it is at equal distance from previous prime (622849) and next prime (622861).

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

It is a cyclic number.

It is not a de Polignac number, because 622855 - 2¹⁷ = 491783 is a prime.

It is a Duffinian number.

622855 is a lucky number.

It is a congruent number.

It is an unprimeable 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 7 ways as a sum of consecutive naturals, for example, 1234 + ... + 1663.

It is an arithmetic number, because the mean of its divisors is an integer number (95634).

2⁶²²⁸⁵⁵ is an apocalyptic number.

622855 is a deficient number, since it is larger than the sum of its proper divisors (142217).

622855 is a wasteful number, since it uses less digits than its factorization.

622855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945.

The product of its digits is 4800, while the sum is 28.

The square root of 622855 is about 789.2116319467. The cubic root of 622855 is about 85.4008746005.

The spelling of 622855 in words is "six hundred twenty-two thousand, eight hundred fifty-five".