621652 has 6 divisors (see below), whose sum is σ = 1087898. Its totient is φ = 310824.

The previous prime is 621641. The next prime is 621671. The reversal of 621652 is 256126.

621652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 404496 + 217156 = 636^2 + 466^2 .

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

621652 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 as a sum of consecutive naturals, namely, 77703 + ... + 77710.

2⁶²¹⁶⁵² is an apocalyptic number.

It is an amenable number.

621652 is a deficient number, since it is larger than the sum of its proper divisors (466246).

621652 is a wasteful number, since it uses less digits than its factorization.

621652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155417 (or 155415 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 621652 is about 788.4491105962. The cubic root of 621652 is about 85.3458572656.

Adding to 621652 its reverse (256126), we get a palindrome (877778).

The spelling of 621652 in words is "six hundred twenty-one thousand, six hundred fifty-two".