161570 has 16 divisors (see below), whose sum is σ = 295488. Its totient is φ = 63600.

The previous prime is 161569. The next prime is 161573. The reversal of 161570 is 75161.

161570 is nontrivially palindromic in base 9.

161570 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161570² = 52209729800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 995 + ... + 1145.

It is an arithmetic number, because the mean of its divisors is an integer number (18468).

2¹⁶¹⁵⁷⁰ is an apocalyptic number.

161570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161570 is a deficient number, since it is larger than the sum of its proper divisors (133918).

161570 is a wasteful number, since it uses less digits than its factorization.

161570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265.

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

The square root of 161570 is about 401.9577092183. The cubic root of 161570 is about 54.4653428341.

It can be divided in two parts, 1615 and 70, that multiplied together give a triangular number (113050 = T₄₇₅).

The spelling of 161570 in words is "one hundred sixty-one thousand, five hundred seventy".