82375421 has 4 divisors (see below), whose sum is σ = 87221052. Its totient is φ = 77529792.

The previous prime is 82375379. The next prime is 82375427. The reversal of 82375421 is 12457328.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43375396 + 39000025 = 6586^2 + 6245^2 .

It is a de Polignac number, because none of the positive numbers 2^k-82375421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82375427) by changing a digit.

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, 2422790 + ... + 2422823.

It is an arithmetic number, because the mean of its divisors is an integer number (21805263).

Almost surely, 2^82375421 is an apocalyptic number.

It is an amenable number.

82375421 is a deficient number, since it is larger than the sum of its proper divisors (4845631).

82375421 is a wasteful number, since it uses less digits than its factorization.

82375421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4845630.

The product of its digits is 13440, while the sum is 32.

The square root of 82375421 is about 9076.0906231703. The cubic root of 82375421 is about 435.1101513448.

The spelling of 82375421 in words is "eighty-two million, three hundred seventy-five thousand, four hundred twenty-one".