81294795 has 12 divisors (see below), whose sum is σ = 140911056. Its totient is φ = 43357200.

The previous prime is 81294779. The next prime is 81294821. The reversal of 81294795 is 59749218.

It is not a de Polignac number, because 81294795 - 2⁴ = 81294779 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1806551 = 81294795 / (8 + 1 + 2 + 9 + 4 + 7 + 9 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 81294795.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 903231 + ... + 903320.

It is an arithmetic number, because the mean of its divisors is an integer number (11742588).

Almost surely, 2^81294795 is an apocalyptic number.

81294795 is a deficient number, since it is larger than the sum of its proper divisors (59616261).

81294795 is a wasteful number, since it uses less digits than its factorization.

81294795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1806562 (or 1806559 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 81294795 is about 9016.3626258043. The cubic root of 81294795 is about 433.1991343153.

The spelling of 81294795 in words is "eighty-one million, two hundred ninety-four thousand, seven hundred ninety-five".