161764 has 12 divisors (see below), whose sum is σ = 291004. Its totient is φ = 78624.

The previous prime is 161761. The next prime is 161771. The reversal of 161764 is 467161.

It is a happy number.

161764 is nontrivially palindromic in base 7.

It can be written as a sum of positive squares in 2 ways, for example, as 153664 + 8100 = 392^2 + 90^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (161761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399 + ... + 694.

2¹⁶¹⁷⁶⁴ is an apocalyptic number.

It is an amenable number.

161764 is a deficient number, since it is larger than the sum of its proper divisors (129240).

161764 is a wasteful number, since it uses less digits than its factorization.

161764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134 (or 1132 counting only the distinct ones).

The product of its digits is 1008, while the sum is 25.

The square root of 161764 is about 402.1989557421. The cubic root of 161764 is about 54.4871332867.

It can be divided in two parts, 1617 and 64, that added together give a square (1681 = 41²).

The spelling of 161764 in words is "one hundred sixty-one thousand, seven hundred sixty-four".