5621251 has 4 divisors (see below), whose sum is σ = 5648104. Its totient is φ = 5594400.

The previous prime is 5621249. The next prime is 5621267. The reversal of 5621251 is 1521265.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1521265 = 5 ⋅304253.

It is a cyclic number.

It is not a de Polignac number, because 5621251 - 2¹ = 5621249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5621221) 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, 13110 + ... + 13531.

It is an arithmetic number, because the mean of its divisors is an integer number (1412026).

Almost surely, 2^5621251 is an apocalyptic number.

5621251 is the 1500-th centered pentagonal number.

5621251 is a deficient number, since it is larger than the sum of its proper divisors (26853).

5621251 is a wasteful number, since it uses less digits than its factorization.

5621251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26852.

The product of its digits is 600, while the sum is 22.

The square root of 5621251 is about 2370.9177547945. The cubic root of 5621251 is about 177.8051459457.

The spelling of 5621251 in words is "five million, six hundred twenty-one thousand, two hundred fifty-one".