81026 has 16 divisors (see below), whose sum is σ = 138240. Its totient is φ = 35280.

The previous prime is 81023. The next prime is 81031. The reversal of 81026 is 62018.

It is a super-4 number, since 4×81026⁴ (a number of 21 digits) contains 4444 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 80995 and 81013.

It is not an unprimeable number, because it can be changed into a prime (81023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 575 + ... + 701.

It is an arithmetic number, because the mean of its divisors is an integer number (8640).

2⁸¹⁰²⁶ is an apocalyptic number.

81026 is a deficient number, since it is larger than the sum of its proper divisors (57214).

81026 is a wasteful number, since it uses less digits than its factorization.

81026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 81026 is about 284.6506630943. The cubic root of 81026 is about 43.2721160570.

The spelling of 81026 in words is "eighty-one thousand, twenty-six".