161122724 has 24 divisors (see below), whose sum is σ = 333359040. Its totient is φ = 66671136.

The previous prime is 161122699. The next prime is 161122781. The reversal of 161122724 is 427221161.

It is a junction number, because it is equal to n+sod(n) for n = 161122693 and 161122702.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98402 + ... + 100025.

It is an arithmetic number, because the mean of its divisors is an integer number (13889960).

Almost surely, 2^161122724 is an apocalyptic number.

161122724 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161122724 is an abundant number, since it is smaller than the sum of its proper divisors (172236316).

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

161122724 is a wasteful number, since it uses less digits than its factorization.

161122724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198467 (or 198465 counting only the distinct ones).

The product of its digits is 1344, while the sum is 26.

The square root of 161122724 is about 12693.4126223014. The cubic root of 161122724 is about 544.1503738346.

Adding to 161122724 its reverse (427221161), we get a palindrome (588343885).

The spelling of 161122724 in words is "one hundred sixty-one million, one hundred twenty-two thousand, seven hundred twenty-four".