81459134 has 8 divisors (see below), whose sum is σ = 126130368. Its totient is φ = 39415680.

The previous prime is 81459127. The next prime is 81459149. The reversal of 81459134 is 43195418.

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 = 81459094 and 81459103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 656867 + ... + 656990.

It is an arithmetic number, because the mean of its divisors is an integer number (15766296).

Almost surely, 2^81459134 is an apocalyptic number.

81459134 is a deficient number, since it is larger than the sum of its proper divisors (44671234).

81459134 is a wasteful number, since it uses less digits than its factorization.

81459134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313890.

The product of its digits is 17280, while the sum is 35.

The square root of 81459134 is about 9025.4714004311. The cubic root of 81459134 is about 433.4908446463.

The spelling of 81459134 in words is "eighty-one million, four hundred fifty-nine thousand, one hundred thirty-four".