181401 has 16 divisors (see below), whose sum is σ = 276480. Its totient is φ = 104720.

The previous prime is 181399. The next prime is 181409. The reversal of 181401 is 104181.

It is not a de Polignac number, because 181401 - 2¹ = 181399 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 181401.

It is not an unprimeable number, because it can be changed into a prime (181409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 640 + ... + 878.

It is an arithmetic number, because the mean of its divisors is an integer number (17280).

2¹⁸¹⁴⁰¹ is an apocalyptic number.

181401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

181401 is a deficient number, since it is larger than the sum of its proper divisors (95079).

181401 is a wasteful number, since it uses less digits than its factorization.

181401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 181401 is about 425.9119627341. The cubic root of 181401 is about 56.6082712548.

Adding to 181401 its reverse (104181), we get a palindrome (285582).

The spelling of 181401 in words is "one hundred eighty-one thousand, four hundred one".