161954 has 8 divisors (see below), whose sum is σ = 261660. Its totient is φ = 74736.

The previous prime is 161947. The next prime is 161957. The reversal of 161954 is 459161.

It can be written as a sum of positive squares in 2 ways, for example, as 156025 + 5929 = 395^2 + 77^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 6229 = 161954 / (1 + 6 + 1 + 9 + 5 + 4).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 161954.

It is not an unprimeable number, because it can be changed into a prime (161957) 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, 3089 + ... + 3140.

2¹⁶¹⁹⁵⁴ is an apocalyptic number.

161954 is a deficient number, since it is larger than the sum of its proper divisors (99706).

161954 is a wasteful number, since it uses less digits than its factorization.

161954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6244.

The product of its digits is 1080, while the sum is 26.

The square root of 161954 is about 402.4350879334. The cubic root of 161954 is about 54.5084575714.

The spelling of 161954 in words is "one hundred sixty-one thousand, nine hundred fifty-four".