13987502 has 4 divisors (see below), whose sum is σ = 20981256. Its totient is φ = 6993750.

The previous prime is 13987489. The next prime is 13987531. The reversal of 13987502 is 20578931.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3496874 + ... + 3496877.

It is an arithmetic number, because the mean of its divisors is an integer number (5245314).

Almost surely, 2^13987502 is an apocalyptic number.

13987502 is a deficient number, since it is larger than the sum of its proper divisors (6993754).

13987502 is an equidigital number, since it uses as much as digits as its factorization.

13987502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6993753.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 13987502 is about 3739.9868983728. The cubic root of 13987502 is about 240.9424861178.

The spelling of 13987502 in words is "thirteen million, nine hundred eighty-seven thousand, five hundred two".