161057 has 6 divisors (see below), whose sum is σ = 174582. Its totient is φ = 148512.

The previous prime is 161053. The next prime is 161059. The reversal of 161057 is 750161.

It can be written as a sum of positive squares in 3 ways, for example, as 256 + 160801 = 16^2 + 401^2 .

It is not a de Polignac number, because 161057 - 2² = 161053 is a prime.

It is a Duffinian number.

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

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 308 + ... + 645.

It is an arithmetic number, because the mean of its divisors is an integer number (29097).

161057 is a Friedman number, since it can be written as 6+(10+1^7)^5, using all its digits and the basic arithmetic operations.

2¹⁶¹⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

161057 is a deficient number, since it is larger than the sum of its proper divisors (13525).

161057 is an equidigital number, since it uses as much as digits as its factorization.

161057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979 (or 966 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 161057 is about 401.3190750513. The cubic root of 161057 is about 54.4076375162.

The spelling of 161057 in words is "one hundred sixty-one thousand, fifty-seven".