1622655 has 24 divisors (see below), whose sum is σ = 2847312. Its totient is φ = 854784.

The previous prime is 1622641. The next prime is 1622659. The reversal of 1622655 is 5562261.

1622655 is a `hidden beast` number, since 1 + 6 + 2 + 2 + 655 = 666.

It is not a de Polignac number, because 1622655 - 2⁴ = 1622639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1622659) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4647 + ... + 4983.

It is an arithmetic number, because the mean of its divisors is an integer number (118638).

2^1622655 is an apocalyptic number.

1622655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1622655 is a deficient number, since it is larger than the sum of its proper divisors (1224657).

1622655 is a wasteful number, since it uses less digits than its factorization.

1622655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455 (or 452 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1622655 is about 1273.8347616547. The cubic root of 1622655 is about 117.5101545472.

The spelling of 1622655 in words is "one million, six hundred twenty-two thousand, six hundred fifty-five".