13987275 has 24 divisors (see below), whose sum is σ = 23242560. Its totient is φ = 7422240.

The previous prime is 13987271. The next prime is 13987291. The reversal of 13987275 is 57278931.

It is not a de Polignac number, because 13987275 - 2² = 13987271 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13987271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20896 + ... + 21554.

It is an arithmetic number, because the mean of its divisors is an integer number (968440).

Almost surely, 2^13987275 is an apocalyptic number.

13987275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13987275 is a deficient number, since it is larger than the sum of its proper divisors (9255285).

13987275 is a wasteful number, since it uses less digits than its factorization.

13987275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955 (or 950 counting only the distinct ones).

The product of its digits is 105840, while the sum is 42.

The square root of 13987275 is about 3739.9565505498. The cubic root of 13987275 is about 240.9411827104.

The spelling of 13987275 in words is "thirteen million, nine hundred eighty-seven thousand, two hundred seventy-five".