622945 has 8 divisors (see below), whose sum is σ = 771840. Its totient is φ = 482160.

The previous prime is 622943. The next prime is 622957. The reversal of 622945 is 549226.

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

It is not a de Polignac number, because 622945 - 2¹ = 622943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (622943) by changing a digit.

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, 1855 + ... + 2164.

It is an arithmetic number, because the mean of its divisors is an integer number (96480).

2⁶²²⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

622945 is a deficient number, since it is larger than the sum of its proper divisors (148895).

622945 is a wasteful number, since it uses less digits than its factorization.

622945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4055.

The product of its digits is 4320, while the sum is 28.

The square root of 622945 is about 789.2686488136. The cubic root of 622945 is about 85.4049877614.

The spelling of 622945 in words is "six hundred twenty-two thousand, nine hundred forty-five".