81264134 has 8 divisors (see below), whose sum is σ = 139309968. Its totient is φ = 34827480.

The previous prime is 81264133. The next prime is 81264137. The reversal of 81264134 is 43146218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 81264097 and 81264106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81264133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2902277 + ... + 2902304.

It is an arithmetic number, because the mean of its divisors is an integer number (17413746).

Almost surely, 2^81264134 is an apocalyptic number.

81264134 is a deficient number, since it is larger than the sum of its proper divisors (58045834).

81264134 is a wasteful number, since it uses less digits than its factorization.

81264134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5804590.

The product of its digits is 4608, while the sum is 29.

The square root of 81264134 is about 9014.6621678241. The cubic root of 81264134 is about 433.1446659292.

It can be divided in two parts, 812 and 64134, that added together give a palindrome (64946).

The spelling of 81264134 in words is "eighty-one million, two hundred sixty-four thousand, one hundred thirty-four".