622545 has 48 divisors (see below), whose sum is σ = 1276800. Its totient is φ = 258720.

The previous prime is 622529. The next prime is 622547. The reversal of 622545 is 545226.

It is not a de Polignac number, because 622545 - 2⁴ = 622529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (622547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56590 + ... + 56600.

It is an arithmetic number, because the mean of its divisors is an integer number (26600).

2⁶²²⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

622545 is an abundant number, since it is smaller than the sum of its proper divisors (654255).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

622545 is a wasteful number, since it uses less digits than its factorization.

622545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51 (or 26 counting only the distinct ones).

The product of its digits is 2400, while the sum is 24.

The square root of 622545 is about 789.0152089789. The cubic root of 622545 is about 85.3867040126.

Subtracting from 622545 its sum of digits (24), we obtain a square (622521 = 789²).

The spelling of 622545 in words is "six hundred twenty-two thousand, five hundred forty-five".