7439421 has 32 divisors (see below), whose sum is σ = 11664000. Its totient is φ = 4167680.

The previous prime is 7439417. The next prime is 7439423. The reversal of 7439421 is 1249347.

It is a happy number.

It is not a de Polignac number, because 7439421 - 2² = 7439417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7439423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49855 + ... + 50003.

It is an arithmetic number, because the mean of its divisors is an integer number (364500).

Almost surely, 2^7439421 is an apocalyptic number.

It is an amenable number.

7439421 is a deficient number, since it is larger than the sum of its proper divisors (4224579).

7439421 is a wasteful number, since it uses less digits than its factorization.

7439421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269.

The product of its digits is 6048, while the sum is 30.

The square root of 7439421 is about 2727.5302014827. The cubic root of 7439421 is about 195.2149372276.

The spelling of 7439421 in words is "seven million, four hundred thirty-nine thousand, four hundred twenty-one".