82421090 has 8 divisors (see below), whose sum is σ = 148357980. Its totient is φ = 32968432.

The previous prime is 82421063. The next prime is 82421093. The reversal of 82421090 is 9012428.

It can be written as a sum of positive squares in 2 ways, for example, as 82319329 + 101761 = 9073^2 + 319^2 .

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

It is not an unprimeable number, because it can be changed into a prime (82421093) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4121045 + ... + 4121064.

Almost surely, 2^82421090 is an apocalyptic number.

82421090 is a deficient number, since it is larger than the sum of its proper divisors (65936890).

82421090 is a wasteful number, since it uses less digits than its factorization.

82421090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8242116.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 82421090 is about 9078.6061705528. The cubic root of 82421090 is about 435.1905449631.

The spelling of 82421090 in words is "eighty-two million, four hundred twenty-one thousand, ninety".