7421280 has 48 divisors (see below), whose sum is σ = 23378544. Its totient is φ = 1978880.

The previous prime is 7421263. The next prime is 7421329. The reversal of 7421280 is 821247.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 7421280.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7251 + ... + 8210.

It is an arithmetic number, because the mean of its divisors is an integer number (487053).

Almost surely, 2^7421280 is an apocalyptic number.

It is an amenable number.

7421280 is an abundant number, since it is smaller than the sum of its proper divisors (15957264).

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

7421280 is a wasteful number, since it uses less digits than its factorization.

7421280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15479 (or 15471 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 7421280 is about 2724.2026356349. The cubic root of 7421280 is about 195.0561311125.

The spelling of 7421280 in words is "seven million, four hundred twenty-one thousand, two hundred eighty".