13421040 has 40 divisors (see below), whose sum is σ = 41605968. Its totient is φ = 3578880.

The previous prime is 13421039. The next prime is 13421071. The reversal of 13421040 is 4012431.

13421040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

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

It is a congruent number.

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, 27721 + ... + 28200.

Almost surely, 2^13421040 is an apocalyptic number.

13421040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13421040 is an abundant number, since it is smaller than the sum of its proper divisors (28184928).

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

13421040 is a wasteful number, since it uses less digits than its factorization.

13421040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55937 (or 55931 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 13421040 is about 3663.4737613364. The cubic root of 13421040 is about 237.6450231541.

Adding to 13421040 its reverse (4012431), we get a palindrome (17433471).

The spelling of 13421040 in words is "thirteen million, four hundred twenty-one thousand, forty".