15947 has 4 divisors (see below), whose sum is σ = 16416. Its totient is φ = 15480.

The previous prime is 15937. The next prime is 15959. The reversal of 15947 is 74951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74951 = 241 ⋅311.

It is a cyclic number.

It is not a de Polignac number, because 15947 - 2¹⁰ = 14923 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (15907) 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, 179 + ... + 252.

It is an arithmetic number, because the mean of its divisors is an integer number (4104).

2¹⁵⁹⁴⁷ is an apocalyptic number.

15947 is the 68-th centered heptagonal number.

15947 is a deficient number, since it is larger than the sum of its proper divisors (469).

15947 is an equidigital number, since it uses as much as digits as its factorization.

15947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468.

The product of its digits is 1260, while the sum is 26.

The square root of 15947 is about 126.2814317309. The cubic root of 15947 is about 25.1705669632.

The spelling of 15947 in words is "fifteen thousand, nine hundred forty-seven".