181226 has 16 divisors (see below), whose sum is σ = 291840. Its totient is φ = 84240.

The previous prime is 181219. The next prime is 181243. The reversal of 181226 is 622181.

181226 is nontrivially palindromic in base 13.

181226 is an undulating number in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 181198 and 181207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2255 + ... + 2333.

It is an arithmetic number, because the mean of its divisors is an integer number (18240).

2¹⁸¹²²⁶ is an apocalyptic number.

181226 is a deficient number, since it is larger than the sum of its proper divisors (110614).

181226 is a wasteful number, since it uses less digits than its factorization.

181226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149.

The product of its digits is 192, while the sum is 20.

The square root of 181226 is about 425.7064716445. The cubic root of 181226 is about 56.5900618094.

The spelling of 181226 in words is "one hundred eighty-one thousand, two hundred twenty-six".