14221540 has 24 divisors (see below), whose sum is σ = 30357432. Its totient is φ = 5594880.

The previous prime is 14221523. The next prime is 14221561. The reversal of 14221540 is 4512241.

It can be written as a sum of positive squares in 4 ways, for example, as 278784 + 13942756 = 528^2 + 3734^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4609 + ... + 7048.

It is an arithmetic number, because the mean of its divisors is an integer number (1264893).

Almost surely, 2^14221540 is an apocalyptic number.

14221540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

14221540 is an abundant number, since it is smaller than the sum of its proper divisors (16135892).

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

14221540 is a wasteful number, since it uses less digits than its factorization.

14221540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11727 (or 11725 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 14221540 is about 3771.1457145011. The cubic root of 14221540 is about 242.2788716489.

Adding to 14221540 its reverse (4512241), we get a palindrome (18733781).

The spelling of 14221540 in words is "fourteen million, two hundred twenty-one thousand, five hundred forty".