602561621 has 4 divisors (see below), whose sum is σ = 604487052. Its totient is φ = 600636192.

The previous prime is 602561587. The next prime is 602561647. The reversal of 602561621 is 126165206.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 267159025 + 335402596 = 16345^2 + 18314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-602561621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (602561221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 962246 + ... + 962871.

It is an arithmetic number, because the mean of its divisors is an integer number (151121763).

Almost surely, 2^602561621 is an apocalyptic number.

It is an amenable number.

602561621 is a deficient number, since it is larger than the sum of its proper divisors (1925431).

602561621 is a wasteful number, since it uses less digits than its factorization.

602561621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925430.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 602561621 is about 24547.1306062440. The cubic root of 602561621 is about 844.6312693934.

The spelling of 602561621 in words is "six hundred two million, five hundred sixty-one thousand, six hundred twenty-one".