7413256621 has 2 divisors, whose sum is σ = 7413256622. Its totient is φ = 7413256620.

The previous prime is 7413256553. The next prime is 7413256649. The reversal of 7413256621 is 1266523147.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4576522500 + 2836734121 = 67650^2 + 53261^2 .

It is a cyclic number.

It is not a de Polignac number, because 7413256621 - 2⁷ = 7413256493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7413256321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3706628310 + 3706628311.

It is an arithmetic number, because the mean of its divisors is an integer number (3706628311).

Almost surely, 2^7413256621 is an apocalyptic number.

It is an amenable number.

7413256621 is a deficient number, since it is larger than the sum of its proper divisors (1).

7413256621 is an equidigital number, since it uses as much as digits as its factorization.

7413256621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 37.

The square root of 7413256621 is about 86100.2707370889. The cubic root of 7413256621 is about 1949.8581199424.

Adding to 7413256621 its reverse (1266523147), we get a palindrome (8679779768).

The spelling of 7413256621 in words is "seven billion, four hundred thirteen million, two hundred fifty-six thousand, six hundred twenty-one".