81064 has 8 divisors (see below), whose sum is σ = 152010. Its totient is φ = 40528.

The previous prime is 81049. The next prime is 81071. The reversal of 81064 is 46018.

It can be written as a sum of positive squares in only one way, i.e., 58564 + 22500 = 242^2 + 150^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5059 + ... + 5074.

2⁸¹⁰⁶⁴ is an apocalyptic number.

It is an amenable number.

81064 is a deficient number, since it is larger than the sum of its proper divisors (70946).

81064 is a wasteful number, since it uses less digits than its factorization.

81064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10139 (or 10135 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 81064 is about 284.7174037533. The cubic root of 81064 is about 43.2788796614.

The spelling of 81064 in words is "eighty-one thousand, sixty-four".