81241134 has 16 divisors (see below), whose sum is σ = 174981072. Its totient is φ = 24997248.

The previous prime is 81241133. The next prime is 81241157. The reversal of 81241134 is 43114218.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81241133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520699 + ... + 520854.

It is an arithmetic number, because the mean of its divisors is an integer number (10936317).

Almost surely, 2^81241134 is an apocalyptic number.

81241134 is an abundant number, since it is smaller than the sum of its proper divisors (93739938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81241134 is a wasteful number, since it uses less digits than its factorization.

81241134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1041571.

The product of its digits is 768, while the sum is 24.

The square root of 81241134 is about 9013.3863780490. The cubic root of 81241134 is about 433.1037980955.

The spelling of 81241134 in words is "eighty-one million, two hundred forty-one thousand, one hundred thirty-four".