81258294 has 32 divisors (see below), whose sum is σ = 177246720. Its totient is φ = 24684192.

The previous prime is 81258277. The next prime is 81258299. The reversal of 81258294 is 49285218.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81258299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 432 + ... + 12755.

It is an arithmetic number, because the mean of its divisors is an integer number (5538960).

Almost surely, 2^81258294 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81258294, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88623360).

81258294 is an abundant number, since it is smaller than the sum of its proper divisors (95988426).

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

81258294 is a wasteful number, since it uses less digits than its factorization.

81258294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13284.

The product of its digits is 46080, while the sum is 39.

The square root of 81258294 is about 9014.3382452624. The cubic root of 81258294 is about 433.1342897837.

The spelling of 81258294 in words is "eighty-one million, two hundred fifty-eight thousand, two hundred ninety-four".