181426 has 8 divisors (see below), whose sum is σ = 311040. Its totient is φ = 77748.

The previous prime is 181421. The next prime is 181439. The reversal of 181426 is 624181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 181397 and 181406.

It is not an unprimeable number, because it can be changed into a prime (181421) by changing a digit.

181426 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6466 + ... + 6493.

It is an arithmetic number, because the mean of its divisors is an integer number (38880).

2¹⁸¹⁴²⁶ is an apocalyptic number.

181426 is a deficient number, since it is larger than the sum of its proper divisors (129614).

181426 is a wasteful number, since it uses less digits than its factorization.

181426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12968.

The product of its digits is 384, while the sum is 22.

The square root of 181426 is about 425.9413105112. The cubic root of 181426 is about 56.6108716480.

It can be divided in two parts, 18 and 1426, that added together give a square (1444 = 38²).

The spelling of 181426 in words is "one hundred eighty-one thousand, four hundred twenty-six".