42821767 has 2 divisors, whose sum is σ = 42821768. Its totient is φ = 42821766.

The previous prime is 42821743. The next prime is 42821783. The reversal of 42821767 is 76712824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42821767 - 2²³ = 34433159 is a prime.

It is equal to p_2594494 and since 42821767 and 2594494 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 (42821797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21410883 + 21410884.

It is an arithmetic number, because the mean of its divisors is an integer number (21410884).

Almost surely, 2^42821767 is an apocalyptic number.

42821767 is a deficient number, since it is larger than the sum of its proper divisors (1).

42821767 is an equidigital number, since it uses as much as digits as its factorization.

42821767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 37.

The square root of 42821767 is about 6543.8342735739. The cubic root of 42821767 is about 349.8550883093.

The spelling of 42821767 in words is "forty-two million, eight hundred twenty-one thousand, seven hundred sixty-seven".