15706 has 4 divisors (see below), whose sum is σ = 23562. Its totient is φ = 7852.

The previous prime is 15683. The next prime is 15727. The reversal of 15706 is 60751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60751 = 79 ⋅769.

It can be written as a sum of positive squares in only one way, i.e., 15625 + 81 = 125^2 + 9^2 .

It is a zygodrome in base 4.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3925 + ... + 3928.

2¹⁵⁷⁰⁶ is an apocalyptic number.

15706 is a deficient number, since it is larger than the sum of its proper divisors (7856).

15706 is an equidigital number, since it uses as much as digits as its factorization.

15706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7855.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 15706 is about 125.3235811809. The cubic root of 15706 is about 25.0431255647.

The spelling of 15706 in words is "fifteen thousand, seven hundred six".