7252621 has 4 divisors (see below), whose sum is σ = 7258012. Its totient is φ = 7247232.

The previous prime is 7252607. The next prime is 7252631. The reversal of 7252621 is 1262527.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1262527 = 7 ⋅180361.

It can be written as a sum of positive squares in 2 ways, for example, as 4884100 + 2368521 = 2210^2 + 1539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7252621 is a prime.

It is a super-2 number, since 2×7252621² = 105201022739282, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7252601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1195 + ... + 3991.

It is an arithmetic number, because the mean of its divisors is an integer number (1814503).

Almost surely, 2^7252621 is an apocalyptic number.

It is an amenable number.

7252621 is a deficient number, since it is larger than the sum of its proper divisors (5391).

7252621 is a wasteful number, since it uses less digits than its factorization.

7252621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5390.

The product of its digits is 1680, while the sum is 25.

The square root of 7252621 is about 2693.0690670683. The cubic root of 7252621 is about 193.5671523655.

The spelling of 7252621 in words is "seven million, two hundred fifty-two thousand, six hundred twenty-one".