13401220 has 24 divisors (see below), whose sum is σ = 32163264. Its totient is φ = 4594656.

The previous prime is 13401217. The next prime is 13401233. The reversal of 13401220 is 2210431.

It is a self number, because there is not a number n which added to its sum of digits gives 13401220.

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, 47722 + ... + 48001.

It is an arithmetic number, because the mean of its divisors is an integer number (1340136).

Almost surely, 2^13401220 is an apocalyptic number.

13401220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13401220 is an abundant number, since it is smaller than the sum of its proper divisors (18762044).

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

13401220 is a wasteful number, since it uses less digits than its factorization.

13401220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95739 (or 95737 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 13401220 is about 3660.7676790531. The cubic root of 13401220 is about 237.5279819293.

Adding to 13401220 its reverse (2210431), we get a palindrome (15611651).

The spelling of 13401220 in words is "thirteen million, four hundred one thousand, two hundred twenty".