7421238 has 48 divisors (see below), whose sum is σ = 18032976. Its totient is φ = 2185920.

The previous prime is 7421237. The next prime is 7421251. The reversal of 7421238 is 8321247.

7421238 is a `hidden beast` number, since 7 + 421 + 238 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7421237) 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 23 ways as a sum of consecutive naturals, for example, 6820 + ... + 7832.

It is an arithmetic number, because the mean of its divisors is an integer number (375687).

Almost surely, 2^7421238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7421238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9016488).

7421238 is an abundant number, since it is smaller than the sum of its proper divisors (10611738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7421238 is a wasteful number, since it uses less digits than its factorization.

7421238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069 (or 1066 counting only the distinct ones).

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

The square root of 7421238 is about 2724.1949269463. The cubic root of 7421238 is about 195.0557631449.

Subtracting 7421238 from its reverse (8321247), we obtain a palindrome (900009).

It can be divided in two parts, 74 and 21238, that added together give a palindrome (21312).

The spelling of 7421238 in words is "seven million, four hundred twenty-one thousand, two hundred thirty-eight".