81242024 has 32 divisors (see below), whose sum is σ = 160960800. Its totient is φ = 38335680.

The previous prime is 81242023. The next prime is 81242039. The reversal of 81242024 is 42024218.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (81242023) 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, 45794 + ... + 47534.

It is an arithmetic number, because the mean of its divisors is an integer number (5030025).

Almost surely, 2^81242024 is an apocalyptic number.

It is an amenable number.

81242024 is a deficient number, since it is larger than the sum of its proper divisors (79718776).

81242024 is a wasteful number, since it uses less digits than its factorization.

81242024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2073 (or 2069 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 81242024 is about 9013.4357489250. The cubic root of 81242024 is about 433.1053796465.

The spelling of 81242024 in words is "eighty-one million, two hundred forty-two thousand, twenty-four".