7421644 has 6 divisors (see below), whose sum is σ = 12987884. Its totient is φ = 3710820.

The previous prime is 7421641. The next prime is 7421677. The reversal of 7421644 is 4461247.

It is not an unprimeable number, because it can be changed into a prime (7421641) 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, 927702 + ... + 927709.

Almost surely, 2^7421644 is an apocalyptic number.

It is an amenable number.

7421644 is a deficient number, since it is larger than the sum of its proper divisors (5566240).

7421644 is a wasteful number, since it uses less digits than its factorization.

7421644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855415 (or 1855413 counting only the distinct ones).

The product of its digits is 5376, while the sum is 28.

The square root of 7421644 is about 2724.2694433554. The cubic root of 7421644 is about 195.0593201074.

The spelling of 7421644 in words is "seven million, four hundred twenty-one thousand, six hundred forty-four".