7421138 has 16 divisors (see below), whose sum is σ = 11517120. Its totient is φ = 3584400.

The previous prime is 7421137. The next prime is 7421143. The reversal of 7421138 is 8311247.

It is a d-powerful number, because it can be written as 7³ + 4⁷ + 2¹⁹ + 1 + 1 + 3¹⁴ + 8⁷ .

It is not an unprimeable number, because it can be changed into a prime (7421131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6683 + ... + 7713.

It is an arithmetic number, because the mean of its divisors is an integer number (719820).

Almost surely, 2^7421138 is an apocalyptic number.

7421138 is a deficient number, since it is larger than the sum of its proper divisors (4095982).

7421138 is a wasteful number, since it uses less digits than its factorization.

7421138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153.

The product of its digits is 1344, while the sum is 26.

The square root of 7421138 is about 2724.1765728381. The cubic root of 7421138 is about 195.0548870258.

It can be divided in two parts, 74 and 21138, that added together give a palindrome (21212).

The spelling of 7421138 in words is "seven million, four hundred twenty-one thousand, one hundred thirty-eight".