181340 has 12 divisors (see below), whose sum is σ = 380856. Its totient is φ = 72528.

The previous prime is 181303. The next prime is 181361. The reversal of 181340 is 43181.

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 3 ways as a sum of consecutive naturals, for example, 4514 + ... + 4553.

It is an arithmetic number, because the mean of its divisors is an integer number (31738).

2¹⁸¹³⁴⁰ is an apocalyptic number.

181340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181340 is an abundant number, since it is smaller than the sum of its proper divisors (199516).

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

181340 is a wasteful number, since it uses less digits than its factorization.

181340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9076 (or 9074 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 181340 is about 425.8403456696. The cubic root of 181340 is about 56.6019252925.

The spelling of 181340 in words is "one hundred eighty-one thousand, three hundred forty".