161774 has 8 divisors (see below), whose sum is σ = 247968. Its totient is φ = 79120.

The previous prime is 161773. The next prime is 161779. The reversal of 161774 is 477161.

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

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767 + ... + 954.

It is an arithmetic number, because the mean of its divisors is an integer number (30996).

2¹⁶¹⁷⁷⁴ is an apocalyptic number.

161774 is a deficient number, since it is larger than the sum of its proper divisors (86194).

161774 is a wasteful number, since it uses less digits than its factorization.

161774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770.

The product of its digits is 1176, while the sum is 26.

The square root of 161774 is about 402.2113872083. The cubic root of 161774 is about 54.4882560336.

The spelling of 161774 in words is "one hundred sixty-one thousand, seven hundred seventy-four".