161960 has 16 divisors (see below), whose sum is σ = 364500. Its totient is φ = 64768.

The previous prime is 161957. The next prime is 161969. The reversal of 161960 is 69161.

It can be written as a sum of positive squares in 2 ways, for example, as 155236 + 6724 = 394^2 + 82^2 .

It is not an unprimeable number, because it can be changed into a prime (161969) 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, 1985 + ... + 2064.

2¹⁶¹⁹⁶⁰ is an apocalyptic number.

161960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161960 is an abundant number, since it is smaller than the sum of its proper divisors (202540).

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

161960 is a wasteful number, since it uses less digits than its factorization.

161960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4060 (or 4056 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 161960 is about 402.4425424828. The cubic root of 161960 is about 54.5091306981.

The spelling of 161960 in words is "one hundred sixty-one thousand, nine hundred sixty".