13542640 has 20 divisors (see below), whose sum is σ = 31486824. Its totient is φ = 5417024.

The previous prime is 13542637. The next prime is 13542647. The reversal of 13542640 is 4624531.

13542640 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 (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13542647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84562 + ... + 84721.

Almost surely, 2^13542640 is an apocalyptic number.

13542640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13542640 is an abundant number, since it is smaller than the sum of its proper divisors (17944184).

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

13542640 is a wasteful number, since it uses less digits than its factorization.

13542640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169296 (or 169290 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 13542640 is about 3680.0326085512. The cubic root of 13542640 is about 238.3605861001.

The spelling of 13542640 in words is "thirteen million, five hundred forty-two thousand, six hundred forty".