161239204 has 27 divisors (see below), whose sum is σ = 328599243. Its totient is φ = 69026328.

The previous prime is 161239201. The next prime is 161239213. The reversal of 161239204 is 402932161.

The square root of 161239204 is 12698.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (161239201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 177319 + ... + 178225.

Almost surely, 2^161239204 is an apocalyptic number.

161239204 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

161239204 is the 12698-th square number.

It is an amenable number.

161239204 is an abundant number, since it is smaller than the sum of its proper divisors (167360039).

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

161239204 is an frugal number, since it uses more digits than its factorization.

161239204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1832 (or 916 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The cubic root of 161239204 is about 544.2814692845.

The spelling of 161239204 in words is "one hundred sixty-one million, two hundred thirty-nine thousand, two hundred four".