81421482 has 24 divisors (see below), whose sum is σ = 165364416. Its totient is φ = 26726568.

The previous prime is 81421463. The next prime is 81421493. The reversal of 81421482 is 28412418.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25423 + ... + 28445.

It is an arithmetic number, because the mean of its divisors is an integer number (6890184).

Almost surely, 2^81421482 is an apocalyptic number.

81421482 is an abundant number, since it is smaller than the sum of its proper divisors (83942934).

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

81421482 is a wasteful number, since it uses less digits than its factorization.

81421482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3162 (or 3095 counting only the distinct ones).

The product of its digits is 4096, while the sum is 30.

The square root of 81421482 is about 9023.3852849139. The cubic root of 81421482 is about 433.4240450464.

The spelling of 81421482 in words is "eighty-one million, four hundred twenty-one thousand, four hundred eighty-two".