81926 has 16 divisors (see below), whose sum is σ = 139104. Its totient is φ = 35904.

The previous prime is 81919. The next prime is 81929. The reversal of 81926 is 62918.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 81895 and 81904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81929) by changing a digit.

81926 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 7 ways as a sum of consecutive naturals, for example, 530 + ... + 666.

It is an arithmetic number, because the mean of its divisors is an integer number (8694).

2⁸¹⁹²⁶ is an apocalyptic number.

81926 is a deficient number, since it is larger than the sum of its proper divisors (57178).

81926 is a wasteful number, since it uses less digits than its factorization.

81926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175.

The product of its digits is 864, while the sum is 26.

The square root of 81926 is about 286.2271824967. The cubic root of 81926 is about 43.4317421590.

The spelling of 81926 in words is "eighty-one thousand, nine hundred twenty-six".