7238421 has 12 divisors (see below), whose sum is σ = 10738572. Its totient is φ = 4694976.

The previous prime is 7238419. The next prime is 7238467. The reversal of 7238421 is 1248327.

7238421 is a `hidden beast` number, since 7 + 238 + 421 = 666.

7238421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3294225 + 3944196 = 1815^2 + 1986^2 .

It is not a de Polignac number, because 7238421 - 2¹ = 7238419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7238401) 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 in 11 ways as a sum of consecutive naturals, for example, 10536 + ... + 11201.

It is an arithmetic number, because the mean of its divisors is an integer number (894881).

Almost surely, 2^7238421 is an apocalyptic number.

It is an amenable number.

7238421 is a deficient number, since it is larger than the sum of its proper divisors (3500151).

7238421 is a wasteful number, since it uses less digits than its factorization.

7238421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21780 (or 21777 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 7238421 is about 2690.4313780507. The cubic root of 7238421 is about 193.4407406222.

The spelling of 7238421 in words is "seven million, two hundred thirty-eight thousand, four hundred twenty-one".