161140 has 24 divisors (see below), whose sum is σ = 387072. Its totient is φ = 55200.

The previous prime is 161137. The next prime is 161141. The reversal of 161140 is 41161.

161140 = T₁₅ + T₁₆ + ... + T₉₈.

It is a self number, because there is not a number n which added to its sum of digits gives 161140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436 + ... + 715.

It is an arithmetic number, because the mean of its divisors is an integer number (16128).

2¹⁶¹¹⁴⁰ is an apocalyptic number.

161140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161140 is an abundant number, since it is smaller than the sum of its proper divisors (225932).

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

161140 is a wasteful number, since it uses less digits than its factorization.

161140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167 (or 1165 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 161140 is about 401.4224707213. The cubic root of 161140 is about 54.4169821548.

It can be divided in two parts, 16 and 1140, that added together give a square (1156 = 34²).

The spelling of 161140 in words is "one hundred sixty-one thousand, one hundred forty".