7421381 has 8 divisors (see below), whose sum is σ = 8522400. Its totient is φ = 6391440.

The previous prime is 7421371. The next prime is 7421383. The reversal of 7421381 is 1831247.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7421381 - 2¹⁴ = 7404997 is a prime.

It is a super-2 number, since 2×7421381² = 110153791894322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7421381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7421383) 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 7 ways as a sum of consecutive naturals, for example, 17546 + ... + 17963.

It is an arithmetic number, because the mean of its divisors is an integer number (1065300).

Almost surely, 2^7421381 is an apocalyptic number.

It is an amenable number.

7421381 is a deficient number, since it is larger than the sum of its proper divisors (1101019).

7421381 is a wasteful number, since it uses less digits than its factorization.

7421381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35539.

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

The square root of 7421381 is about 2724.2211731062. The cubic root of 7421381 is about 195.0570159814.

The spelling of 7421381 in words is "seven million, four hundred twenty-one thousand, three hundred eighty-one".