13287945 has 32 divisors (see below), whose sum is σ = 24001920. Its totient is φ = 6218240.

The previous prime is 13287941. The next prime is 13287947. The reversal of 13287945 is 54978231.

It is not a de Polignac number, because 13287945 - 2² = 13287941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13287941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3397 + ... + 6173.

It is an arithmetic number, because the mean of its divisors is an integer number (750060).

Almost surely, 2^13287945 is an apocalyptic number.

13287945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13287945 is a deficient number, since it is larger than the sum of its proper divisors (10713975).

13287945 is a wasteful number, since it uses less digits than its factorization.

13287945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825.

The product of its digits is 60480, while the sum is 39.

The square root of 13287945 is about 3645.2633649710. The cubic root of 13287945 is about 236.8568453074.

The spelling of 13287945 in words is "thirteen million, two hundred eighty-seven thousand, nine hundred forty-five".