652621 has 2 divisors, whose sum is σ = 652622. Its totient is φ = 652620.

The previous prime is 652609. The next prime is 652627. The reversal of 652621 is 126256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376996 + 275625 = 614^2 + 525^2 .

It is a cyclic number.

It is not a de Polignac number, because 652621 - 2⁷ = 652493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 652592 and 652601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (652627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326310 + 326311.

It is an arithmetic number, because the mean of its divisors is an integer number (326311).

2⁶⁵²⁶²¹ is an apocalyptic number.

It is an amenable number.

652621 is a deficient number, since it is larger than the sum of its proper divisors (1).

652621 is an equidigital number, since it uses as much as digits as its factorization.

652621 is an evil number, because the sum of its binary digits is even.

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

The square root of 652621 is about 807.8496147180. The cubic root of 652621 is about 86.7401858082.

Adding to 652621 its reverse (126256), we get a palindrome (778877).

The spelling of 652621 in words is "six hundred fifty-two thousand, six hundred twenty-one".