13287420 has 36 divisors (see below), whose sum is σ = 40305720. Its totient is φ = 3543264.

The previous prime is 13287397. The next prime is 13287451. The reversal of 13287420 is 2478231.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36730 + ... + 37089.

Almost surely, 2^13287420 is an apocalyptic number.

13287420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13287420 is an abundant number, since it is smaller than the sum of its proper divisors (27018300).

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

13287420 is a wasteful number, since it uses less digits than its factorization.

13287420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73834 (or 73829 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 13287420 is about 3645.1913530019. The cubic root of 13287420 is about 236.8537259016.

The spelling of 13287420 in words is "thirteen million, two hundred eighty-seven thousand, four hundred twenty".