161056 has 24 divisors (see below), whose sum is σ = 362880. Its totient is φ = 68928.

The previous prime is 161053. The next prime is 161059. The reversal of 161056 is 650161.

It is an interprime number because it is at equal distance from previous prime (161053) and next prime (161059).

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

It is not an unprimeable number, because it can be changed into a prime (161053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136 + ... + 583.

It is an arithmetic number, because the mean of its divisors is an integer number (15120).

161056 is a Friedman number, since it can be written as 11^(6-6^0)+5, using all its digits and the basic arithmetic operations.

2¹⁶¹⁰⁵⁶ is an apocalyptic number.

161056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161056 is an abundant number, since it is smaller than the sum of its proper divisors (201824).

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

161056 is an equidigital number, since it uses as much as digits as its factorization.

161056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736 (or 728 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 161056 is about 401.3178291579. The cubic root of 161056 is about 54.4075249106.

The spelling of 161056 in words is "one hundred sixty-one thousand, fifty-six".