161070 has 64 divisors (see below), whose sum is σ = 483840. Its totient is φ = 33408.

The previous prime is 161059. The next prime is 161071. The reversal of 161070 is 70161.

It is a Harshad number since it is a multiple of its sum of digits (15).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161071) by changing a digit.

161070 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2701 + ... + 2759.

It is an arithmetic number, because the mean of its divisors is an integer number (7560).

2¹⁶¹⁰⁷⁰ is an apocalyptic number.

161070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241920).

161070 is an abundant number, since it is smaller than the sum of its proper divisors (322770).

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

161070 is a wasteful number, since it uses less digits than its factorization.

161070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89.

The product of its (nonzero) digits is 42, while the sum is 15.

The square root of 161070 is about 401.3352713132. The cubic root of 161070 is about 54.4091013463.

Subtracting from 161070 its product of nonzero digits (42), we obtain a triangular number (161028 = T₅₆₇).

Subtracting from 161070 its reverse (70161), we obtain a palindrome (90909).

The spelling of 161070 in words is "one hundred sixty-one thousand, seventy".