621872 has 10 divisors (see below), whose sum is σ = 1204908. Its totient is φ = 310928.

The previous prime is 621871. The next prime is 621883. The reversal of 621872 is 278126.

621872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (621871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19418 + ... + 19449.

2⁶²¹⁸⁷² is an apocalyptic number.

It is an amenable number.

621872 is a deficient number, since it is larger than the sum of its proper divisors (583036).

621872 is a wasteful number, since it uses less digits than its factorization.

621872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38875 (or 38869 counting only the distinct ones).

The product of its digits is 1344, while the sum is 26.

The square root of 621872 is about 788.5886126492. The cubic root of 621872 is about 85.3559239235.

Adding to 621872 its reverse (278126), we get a palindrome (899998).

The spelling of 621872 in words is "six hundred twenty-one thousand, eight hundred seventy-two".