161297 has 4 divisors (see below), whose sum is σ = 162996. Its totient is φ = 159600.

The previous prime is 161281. The next prime is 161303. The reversal of 161297 is 792161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 101761 + 59536 = 319^2 + 244^2 .

It is a cyclic number.

It is not a de Polignac number, because 161297 - 2⁴ = 161281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161237) 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, 698 + ... + 899.

It is an arithmetic number, because the mean of its divisors is an integer number (40749).

2¹⁶¹²⁹⁷ is an apocalyptic number.

It is an amenable number.

161297 is a deficient number, since it is larger than the sum of its proper divisors (1699).

161297 is a wasteful number, since it uses less digits than its factorization.

161297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698.

The product of its digits is 756, while the sum is 26.

The square root of 161297 is about 401.6179776853. The cubic root of 161297 is about 54.4346493863.

The spelling of 161297 in words is "one hundred sixty-one thousand, two hundred ninety-seven".