13131420 has 24 divisors (see below), whose sum is σ = 36768144. Its totient is φ = 3501696.

The previous prime is 13131407. The next prime is 13131421. The reversal of 13131420 is 2413131.

13131420 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 13131420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109369 + ... + 109488.

It is an arithmetic number, because the mean of its divisors is an integer number (1532006).

Almost surely, 2^13131420 is an apocalyptic number.

13131420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13131420 is an abundant number, since it is smaller than the sum of its proper divisors (23636724).

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

13131420 is a wasteful number, since it uses less digits than its factorization.

13131420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218869 (or 218867 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 13131420 is about 3623.7301224015. The cubic root of 13131420 is about 235.9231531852.

Adding to 13131420 its reverse (2413131), we get a palindrome (15544551).

The spelling of 13131420 in words is "thirteen million, one hundred thirty-one thousand, four hundred twenty".