42482821 has 2 divisors, whose sum is σ = 42482822. Its totient is φ = 42482820.

The previous prime is 42482809. The next prime is 42482827. The reversal of 42482821 is 12828424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42432196 + 50625 = 6514^2 + 225^2 .

It is a cyclic number.

It is not a de Polignac number, because 42482821 - 2²³ = 34094213 is a prime.

It is equal to p_2575219 and since 42482821 and 2575219 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42482827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21241410 + 21241411.

It is an arithmetic number, because the mean of its divisors is an integer number (21241411).

Almost surely, 2^42482821 is an apocalyptic number.

It is an amenable number.

42482821 is a deficient number, since it is larger than the sum of its proper divisors (1).

42482821 is an equidigital number, since it uses as much as digits as its factorization.

42482821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8192, while the sum is 31.

The square root of 42482821 is about 6517.8847028772. The cubic root of 42482821 is about 348.9295758592.

The spelling of 42482821 in words is "forty-two million, four hundred eighty-two thousand, eight hundred twenty-one".