7421290 has 16 divisors (see below), whose sum is σ = 13458312. Its totient is φ = 2946304.

The previous prime is 7421263. The next prime is 7421329. The reversal of 7421290 is 921247.

It can be written as a sum of positive squares in 4 ways, for example, as 4575321 + 2845969 = 2139^2 + 1687^2 .

It is an unprimeable number.

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, 1339 + ... + 4078.

Almost surely, 2^7421290 is an apocalyptic number.

7421290 is a deficient number, since it is larger than the sum of its proper divisors (6037022).

7421290 is a wasteful number, since it uses less digits than its factorization.

7421290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5561.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 7421290 is about 2724.2044710337. The cubic root of 7421290 is about 195.0562187237.

The spelling of 7421290 in words is "seven million, four hundred twenty-one thousand, two hundred ninety".