161205392 has 10 divisors (see below), whose sum is σ = 312335478. Its totient is φ = 80602688.

The previous prime is 161205391. The next prime is 161205397. The reversal of 161205392 is 293502161.

It can be written as a sum of positive squares in only one way, i.e., 150209536 + 10995856 = 12256^2 + 3316^2 .

It is not an unprimeable number, because it can be changed into a prime (161205391) 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 as a sum of consecutive naturals, namely, 5037653 + ... + 5037684.

Almost surely, 2^161205392 is an apocalyptic number.

It is an amenable number.

161205392 is a deficient number, since it is larger than the sum of its proper divisors (151130086).

161205392 is a wasteful number, since it uses less digits than its factorization.

161205392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10075345 (or 10075339 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 161205392 is about 12696.6685394240. The cubic root of 161205392 is about 544.2434211938.

It can be divided in two parts, 16120 and 5392, that added together give a palindrome (21512).

The spelling of 161205392 in words is "one hundred sixty-one million, two hundred five thousand, three hundred ninety-two".