81005342 has 8 divisors (see below), whose sum is σ = 132554232. Its totient is φ = 36820600.

The previous prime is 81005329. The next prime is 81005363. The reversal of 81005342 is 24350018.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1841009 + ... + 1841052.

It is an arithmetic number, because the mean of its divisors is an integer number (16569279).

Almost surely, 2^81005342 is an apocalyptic number.

81005342 is a deficient number, since it is larger than the sum of its proper divisors (51548890).

81005342 is a wasteful number, since it uses less digits than its factorization.

81005342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3682074.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 81005342 is about 9000.2967728848. The cubic root of 81005342 is about 432.6843826081.

The spelling of 81005342 in words is "eighty-one million, five thousand, three hundred forty-two".