161542304 has 96 divisors (see below), whose sum is σ = 404320896. Its totient is φ = 61701120.

The previous prime is 161542289. The next prime is 161542369. The reversal of 161542304 is 403245161.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129974 + ... + 131210.

It is an arithmetic number, because the mean of its divisors is an integer number (4211676).

Almost surely, 2^161542304 is an apocalyptic number.

161542304 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161542304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202160448).

161542304 is an abundant number, since it is smaller than the sum of its proper divisors (242778592).

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

161542304 is a wasteful number, since it uses less digits than its factorization.

161542304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318 (or 1310 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 161542304 is about 12709.9293467745. The cubic root of 161542304 is about 544.6223054355.

Adding to 161542304 its reverse (403245161), we get a palindrome (564787465).

The spelling of 161542304 in words is "one hundred sixty-one million, five hundred forty-two thousand, three hundred four".