5257621 has 4 divisors (see below), whose sum is σ = 5331744. Its totient is φ = 5183500.

The previous prime is 5257619. The next prime is 5257627. The reversal of 5257621 is 1267525.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5257621 - 2¹ = 5257619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5257621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5257627) 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, 36955 + ... + 37096.

It is an arithmetic number, because the mean of its divisors is an integer number (1332936).

Almost surely, 2^5257621 is an apocalyptic number.

It is an amenable number.

5257621 is a deficient number, since it is larger than the sum of its proper divisors (74123).

5257621 is an equidigital number, since it uses as much as digits as its factorization.

5257621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74122.

The product of its digits is 4200, while the sum is 28.

The square root of 5257621 is about 2292.9502829324. The cubic root of 5257621 is about 173.8853893593.

The spelling of 5257621 in words is "five million, two hundred fifty-seven thousand, six hundred twenty-one".