7457621 has 2 divisors, whose sum is σ = 7457622. Its totient is φ = 7457620.

The previous prime is 7457603. The next prime is 7457629. The reversal of 7457621 is 1267547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3900625 + 3556996 = 1975^2 + 1886^2 .

It is a cyclic number.

It is not a de Polignac number, because 7457621 - 2¹⁴ = 7441237 is a prime.

It is a super-2 number, since 2×7457621² = 111232221959282, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7457629) 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 as a sum of consecutive naturals, namely, 3728810 + 3728811.

It is an arithmetic number, because the mean of its divisors is an integer number (3728811).

Almost surely, 2^7457621 is an apocalyptic number.

It is an amenable number.

7457621 is a deficient number, since it is larger than the sum of its proper divisors (1).

7457621 is an equidigital number, since it uses as much as digits as its factorization.

7457621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 32.

The square root of 7457621 is about 2730.8645151307. The cubic root of 7457621 is about 195.3740006133.

The spelling of 7457621 in words is "seven million, four hundred fifty-seven thousand, six hundred twenty-one".