13442540 has 12 divisors (see below), whose sum is σ = 28229376. Its totient is φ = 5377008.

The previous prime is 13442537. The next prime is 13442591. The reversal of 13442540 is 4524431.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336044 + ... + 336083.

It is an arithmetic number, because the mean of its divisors is an integer number (2352448).

Almost surely, 2^13442540 is an apocalyptic number.

13442540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13442540 is an abundant number, since it is smaller than the sum of its proper divisors (14786836).

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

13442540 is a wasteful number, since it uses less digits than its factorization.

13442540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672136 (or 672134 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 13442540 is about 3666.4069604996. The cubic root of 13442540 is about 237.7718549069.

Adding to 13442540 its reverse (4524431), we get a palindrome (17966971).

The spelling of 13442540 in words is "thirteen million, four hundred forty-two thousand, five hundred forty".