13986281 has 4 divisors (see below), whose sum is σ = 14025600. Its totient is φ = 13946964.

The previous prime is 13986253. The next prime is 13986283. The reversal of 13986281 is 18268931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18268931 = 17 ⋅1074643.

It is a cyclic number.

It is not a de Polignac number, because 13986281 - 2¹⁴ = 13969897 is a prime.

It is a super-2 number, since 2×13986281² = 391232112421922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13986283) 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, 19121 + ... + 19838.

It is an arithmetic number, because the mean of its divisors is an integer number (3506400).

Almost surely, 2^13986281 is an apocalyptic number.

13986281 is the 1673-rd centered decagonal number.

It is an amenable number.

13986281 is a deficient number, since it is larger than the sum of its proper divisors (39319).

13986281 is an equidigital number, since it uses as much as digits as its factorization.

13986281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39318.

The product of its digits is 20736, while the sum is 38.

The square root of 13986281 is about 3739.8236589444. The cubic root of 13986281 is about 240.9354751128.

The spelling of 13986281 in words is "thirteen million, nine hundred eighty-six thousand, two hundred eighty-one".