7564421 has 2 divisors, whose sum is σ = 7564422. Its totient is φ = 7564420.

The previous prime is 7564397. The next prime is 7564429. The reversal of 7564421 is 1244657.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5712100 + 1852321 = 2390^2 + 1361^2 .

It is a cyclic number.

It is not a de Polignac number, because 7564421 - 2⁶ = 7564357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7564429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3782210 + 3782211.

It is an arithmetic number, because the mean of its divisors is an integer number (3782211).

Almost surely, 2^7564421 is an apocalyptic number.

It is an amenable number.

7564421 is a deficient number, since it is larger than the sum of its proper divisors (1).

7564421 is an equidigital number, since it uses as much as digits as its factorization.

7564421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 29.

The square root of 7564421 is about 2750.3492505498. The cubic root of 7564421 is about 196.3022287862.

The spelling of 7564421 in words is "seven million, five hundred sixty-four thousand, four hundred twenty-one".