181420 has 24 divisors (see below), whose sum is σ = 391104. Its totient is φ = 70656.

The previous prime is 181409. The next prime is 181421. The reversal of 181420 is 24181.

It is a happy number.

181420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 181394 and 181403.

It is not an unprimeable number, because it can be changed into a prime (181421) 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, 844 + ... + 1036.

It is an arithmetic number, because the mean of its divisors is an integer number (16296).

2¹⁸¹⁴²⁰ is an apocalyptic number.

181420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181420 is an abundant number, since it is smaller than the sum of its proper divisors (209684).

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

181420 is a wasteful number, since it uses less digits than its factorization.

181420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 181420 is about 425.9342672291. The cubic root of 181420 is about 56.6102475754.

The spelling of 181420 in words is "one hundred eighty-one thousand, four hundred twenty".