621552 has 40 divisors (see below), whose sum is σ = 1678464. Its totient is φ = 197824.

The previous prime is 621541. The next prime is 621583. The reversal of 621552 is 255126.

It is a congruent number.

It is an unprimeable number.

621552 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 823 + ... + 1385.

2⁶²¹⁵⁵² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (839232).

621552 is an abundant number, since it is smaller than the sum of its proper divisors (1056912).

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

621552 is a wasteful number, since it uses less digits than its factorization.

621552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597 (or 591 counting only the distinct ones).

The product of its digits is 600, while the sum is 21.

The square root of 621552 is about 788.3856924120. The cubic root of 621552 is about 85.3412807268.

Adding to 621552 its reverse (255126), we get a palindrome (876678).

The spelling of 621552 in words is "six hundred twenty-one thousand, five hundred fifty-two".