161404162 has 4 divisors (see below), whose sum is σ = 242106246. Its totient is φ = 80702080.

The previous prime is 161404153. The next prime is 161404213. The reversal of 161404162 is 261404161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 160503561 + 900601 = 12669^2 + 949^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 40351039 + ... + 40351042.

Almost surely, 2^161404162 is an apocalyptic number.

161404162 is a deficient number, since it is larger than the sum of its proper divisors (80702084).

161404162 is an equidigital number, since it uses as much as digits as its factorization.

161404162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80702083.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 161404162 is about 12704.4937718903. The cubic root of 161404162 is about 544.4670175872.

Subtracting 161404162 from its reverse (261404161), we obtain a palindrome (99999999).

It can be divided in two parts, 16140 and 4162, that added together give a palindrome (20302).

The spelling of 161404162 in words is "one hundred sixty-one million, four hundred four thousand, one hundred sixty-two".