7421380 has 12 divisors (see below), whose sum is σ = 15584940. Its totient is φ = 2968544.

The previous prime is 7421371. The next prime is 7421383. The reversal of 7421380 is 831247.

It can be written as a sum of positive squares in 2 ways, for example, as 3161284 + 4260096 = 1778^2 + 2064^2 .

It is a super-2 number, since 2×7421380² = 110153762208800, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7421383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185515 + ... + 185554.

It is an arithmetic number, because the mean of its divisors is an integer number (1298745).

Almost surely, 2^7421380 is an apocalyptic number.

It is an amenable number.

7421380 is an abundant number, since it is smaller than the sum of its proper divisors (8163560).

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

7421380 is a wasteful number, since it uses less digits than its factorization.

7421380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371078 (or 371076 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 7421380 is about 2724.2209895675. The cubic root of 7421380 is about 195.0570072204.

The spelling of 7421380 in words is "seven million, four hundred twenty-one thousand, three hundred eighty".