5261621 has 4 divisors (see below), whose sum is σ = 5333772. Its totient is φ = 5189472.

The previous prime is 5261617. The next prime is 5261623. The reversal of 5261621 is 1261625.

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 1416100 + 3845521 = 1190^2 + 1961^2 .

It is a cyclic number.

It is not a de Polignac number, because 5261621 - 2² = 5261617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5261623) 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, 35966 + ... + 36111.

It is an arithmetic number, because the mean of its divisors is an integer number (1333443).

Almost surely, 2^5261621 is an apocalyptic number.

It is an amenable number.

5261621 is a deficient number, since it is larger than the sum of its proper divisors (72151).

5261621 is an equidigital number, since it uses as much as digits as its factorization.

5261621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72150.

The product of its digits is 720, while the sum is 23.

The square root of 5261621 is about 2293.8223558070. The cubic root of 5261621 is about 173.9294755371.

The spelling of 5261621 in words is "five million, two hundred sixty-one thousand, six hundred twenty-one".