81258874 has 8 divisors (see below), whose sum is σ = 125820288. Its totient is φ = 39318780.

The previous prime is 81258851. The next prime is 81258883. The reversal of 81258874 is 47885218.

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

It is a self number, because there is not a number n which added to its sum of digits gives 81258874.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 655252 + ... + 655375.

It is an arithmetic number, because the mean of its divisors is an integer number (15727536).

Almost surely, 2^81258874 is an apocalyptic number.

81258874 is a deficient number, since it is larger than the sum of its proper divisors (44561414).

81258874 is a wasteful number, since it uses less digits than its factorization.

81258874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1310660.

The product of its digits is 143360, while the sum is 43.

The square root of 81258874 is about 9014.3704161744. The cubic root of 81258874 is about 433.1353203135.

The spelling of 81258874 in words is "eighty-one million, two hundred fifty-eight thousand, eight hundred seventy-four".