621626 has 8 divisors (see below), whose sum is σ = 946560. Its totient is φ = 306108.

The previous prime is 621619. The next prime is 621629. The reversal of 621626 is 626126.

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

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (621629) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2186 + ... + 2453.

It is an arithmetic number, because the mean of its divisors is an integer number (118320).

2⁶²¹⁶²⁶ is an apocalyptic number.

621626 is a deficient number, since it is larger than the sum of its proper divisors (324934).

621626 is a wasteful number, since it uses less digits than its factorization.

621626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4708.

The product of its digits is 864, while the sum is 23.

The square root of 621626 is about 788.4326223591. The cubic root of 621626 is about 85.3446674127.

The spelling of 621626 in words is "six hundred twenty-one thousand, six hundred twenty-six".