161202404 has 12 divisors (see below), whose sum is σ = 307750128. Its totient is φ = 73273800.

The previous prime is 161202397. The next prime is 161202409. The reversal of 161202404 is 404202161.

It is not an unprimeable number, because it can be changed into a prime (161202409) 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, 1831802 + ... + 1831889.

It is an arithmetic number, because the mean of its divisors is an integer number (25645844).

Almost surely, 2^161202404 is an apocalyptic number.

It is an amenable number.

161202404 is a deficient number, since it is larger than the sum of its proper divisors (146547724).

161202404 is a wasteful number, since it uses less digits than its factorization.

161202404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3663706 (or 3663704 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 161202404 is about 12696.5508702167. The cubic root of 161202404 is about 544.2400585904.

Adding to 161202404 its reverse (404202161), we get a palindrome (565404565).

The spelling of 161202404 in words is "one hundred sixty-one million, two hundred two thousand, four hundred four".