7400621 has 2 divisors, whose sum is σ = 7400622. Its totient is φ = 7400620.

The previous prime is 7400587. The next prime is 7400647. The reversal of 7400621 is 1260047.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4120900 + 3279721 = 2030^2 + 1811^2 .

It is an emirp because it is prime and its reverse (1260047) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7400621 - 2¹⁰ = 7399597 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 7400593 and 7400602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7400651) 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, 3700310 + 3700311.

It is an arithmetic number, because the mean of its divisors is an integer number (3700311).

Almost surely, 2^7400621 is an apocalyptic number.

It is an amenable number.

7400621 is a deficient number, since it is larger than the sum of its proper divisors (1).

7400621 is an equidigital number, since it uses as much as digits as its factorization.

7400621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 7400621 is about 2720.4082414226. The cubic root of 7400621 is about 194.8749669647.

Adding to 7400621 its reverse (1260047), we get a palindrome (8660668).

The spelling of 7400621 in words is "seven million, four hundred thousand, six hundred twenty-one".