161171260 has 48 divisors (see below), whose sum is σ = 349102656. Its totient is φ = 62456832.

The previous prime is 161171249. The next prime is 161171279. The reversal of 161171260 is 62171161.

It is a happy number.

It is a congruent number.

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, 320169 + ... + 320671.

It is an arithmetic number, because the mean of its divisors is an integer number (7272972).

Almost surely, 2^161171260 is an apocalyptic number.

161171260 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 161171260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174551328).

161171260 is an abundant number, since it is smaller than the sum of its proper divisors (187931396).

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

161171260 is a wasteful number, since it uses less digits than its factorization.

161171260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982 (or 980 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 161171260 is about 12695.3243361483. The cubic root of 161171260 is about 544.2050076159.

Subtracting from 161171260 its reverse (62171161), we obtain a palindrome (99000099).

The spelling of 161171260 in words is "one hundred sixty-one million, one hundred seventy-one thousand, two hundred sixty".