161802 has 24 divisors (see below), whose sum is σ = 358020. Its totient is φ = 52800.

The previous prime is 161783. The next prime is 161807. The reversal of 161802 is 208161.

It can be written as a sum of positive squares in 2 ways, for example, as 159201 + 2601 = 399^2 + 51^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (161807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1552 + ... + 1652.

2¹⁶¹⁸⁰² is an apocalyptic number.

161802 is an abundant number, since it is smaller than the sum of its proper divisors (196218).

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

161802 is a wasteful number, since it uses less digits than its factorization.

161802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 161802 is about 402.2461932697. The cubic root of 161802 is about 54.4913994789.

Adding to 161802 its reverse (208161), we get a palindrome (369963).

The spelling of 161802 in words is "one hundred sixty-one thousand, eight hundred two".