7442621 has 2 divisors, whose sum is σ = 7442622. Its totient is φ = 7442620.

The previous prime is 7442563. The next prime is 7442627. The reversal of 7442621 is 1262447.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5354596 + 2088025 = 2314^2 + 1445^2 .

It is a cyclic number.

It is not a de Polignac number, because 7442621 - 2⁶ = 7442557 is a prime.

It is a Chen prime.

It is equal to p₅₀₄₆₅₆ and since 7442621 and 504656 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7442627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3721310 + 3721311.

It is an arithmetic number, because the mean of its divisors is an integer number (3721311).

Almost surely, 2^7442621 is an apocalyptic number.

It is an amenable number.

7442621 is a deficient number, since it is larger than the sum of its proper divisors (1).

7442621 is an equidigital number, since it uses as much as digits as its factorization.

7442621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 26.

The square root of 7442621 is about 2728.1167497012. The cubic root of 7442621 is about 195.2429231982.

It can be divided in two parts, 74426 and 21, that added together give a palindrome (74447).

The spelling of 7442621 in words is "seven million, four hundred forty-two thousand, six hundred twenty-one".