161256 has 16 divisors (see below), whose sum is σ = 403200. Its totient is φ = 53744.

The previous prime is 161237. The next prime is 161263. The reversal of 161256 is 652161.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

161256 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3336 + ... + 3383.

It is an arithmetic number, because the mean of its divisors is an integer number (25200).

2¹⁶¹²⁵⁶ is an apocalyptic number.

It is an amenable number.

161256 is an abundant number, since it is smaller than the sum of its proper divisors (241944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161256 is a wasteful number, since it uses less digits than its factorization.

161256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6728 (or 6724 counting only the distinct ones).

The product of its digits is 360, while the sum is 21.

The square root of 161256 is about 401.5669309094. The cubic root of 161256 is about 54.4300367571.

The spelling of 161256 in words is "one hundred sixty-one thousand, two hundred fifty-six".