161302404 has 24 divisors (see below), whose sum is σ = 392736960. Its totient is φ = 51429664.

The previous prime is 161302403. The next prime is 161302423. The reversal of 161302404 is 404203161.

It is not an unprimeable number, because it can be changed into a prime (161302403) 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 7 ways as a sum of consecutive naturals, for example, 291939 + ... + 292490.

It is an arithmetic number, because the mean of its divisors is an integer number (16364040).

Almost surely, 2^161302404 is an apocalyptic number.

It is an amenable number.

161302404 is an abundant number, since it is smaller than the sum of its proper divisors (231434556).

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

161302404 is a wasteful number, since it uses less digits than its factorization.

161302404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584459 (or 584457 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 161302404 is about 12700.4883370680. The cubic root of 161302404 is about 544.3525729505.

Adding to 161302404 its reverse (404203161), we get a palindrome (565505565).

The spelling of 161302404 in words is "one hundred sixty-one million, three hundred two thousand, four hundred four".