42281807 has 2 divisors, whose sum is σ = 42281808. Its totient is φ = 42281806.

The previous prime is 42281803. The next prime is 42281831. The reversal of 42281807 is 70818224.

42281807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42281807 - 2² = 42281803 is a prime.

It is equal to p_2563736 and since 42281807 and 2563736 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 (42281803) 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 as a sum of consecutive naturals, namely, 21140903 + 21140904.

It is an arithmetic number, because the mean of its divisors is an integer number (21140904).

Almost surely, 2^42281807 is an apocalyptic number.

42281807 is a deficient number, since it is larger than the sum of its proper divisors (1).

42281807 is an equidigital number, since it uses as much as digits as its factorization.

42281807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 42281807 is about 6502.4462319961. The cubic root of 42281807 is about 348.3783675867.

The spelling of 42281807 in words is "forty-two million, two hundred eighty-one thousand, eight hundred seven".