161244260 has 72 divisors (see below), whose sum is σ = 373294656. Its totient is φ = 58386240.

The previous prime is 161244257. The next prime is 161244271. The reversal of 161244260 is 62442161.

161244260 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161244260² = 51999422765895200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165575 + ... + 166545.

It is an arithmetic number, because the mean of its divisors is an integer number (5184648).

Almost surely, 2^161244260 is an apocalyptic number.

161244260 is a gapful number since it is divisible by the number (10) 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 161244260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186647328).

161244260 is an abundant number, since it is smaller than the sum of its proper divisors (212050396).

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

161244260 is a wasteful number, since it uses less digits than its factorization.

161244260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041 (or 1020 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 161244260 is about 12698.1990849096. The cubic root of 161244260 is about 544.2871582615.

The spelling of 161244260 in words is "one hundred sixty-one million, two hundred forty-four thousand, two hundred sixty".