161974 has 8 divisors (see below), whose sum is σ = 245520. Its totient is φ = 80136.

The previous prime is 161971. The next prime is 161977. The reversal of 161974 is 479161.

161974 is nontrivially palindromic in base 4.

It is an interprime number because it is at equal distance from previous prime (161971) and next prime (161977).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161971) 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, 154 + ... + 589.

It is an arithmetic number, because the mean of its divisors is an integer number (30690).

2¹⁶¹⁹⁷⁴ is an apocalyptic number.

161974 is a deficient number, since it is larger than the sum of its proper divisors (83546).

161974 is a wasteful number, since it uses less digits than its factorization.

161974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854.

The product of its digits is 1512, while the sum is 28.

The square root of 161974 is about 402.4599358942. The cubic root of 161974 is about 54.5107012625.

The spelling of 161974 in words is "one hundred sixty-one thousand, nine hundred seventy-four".