161170259 has 4 divisors (see below), whose sum is σ = 161499000. Its totient is φ = 160841520.

The previous prime is 161170249. The next prime is 161170277. The reversal of 161170259 is 952071161.

161170259 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 952071161 = 37 ⋅25731653.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161170259 is a prime.

It is a super-2 number, since 2×161170259² = 51951704772254162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161170249) 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, 163634 + ... + 164615.

It is an arithmetic number, because the mean of its divisors is an integer number (40374750).

Almost surely, 2^161170259 is an apocalyptic number.

161170259 is a deficient number, since it is larger than the sum of its proper divisors (328741).

161170259 is an equidigital number, since it uses as much as digits as its factorization.

161170259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328740.

The product of its (nonzero) digits is 3780, while the sum is 32.

The square root of 161170259 is about 12695.2849121239. The cubic root of 161170259 is about 544.2038809669.

The spelling of 161170259 in words is "one hundred sixty-one million, one hundred seventy thousand, two hundred fifty-nine".