42851867 has 2 divisors, whose sum is σ = 42851868. Its totient is φ = 42851866.

The previous prime is 42851813. The next prime is 42851869. The reversal of 42851867 is 76815824.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42851867 is a prime.

Together with 42851869, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42851869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21425933 + 21425934.

It is an arithmetic number, because the mean of its divisors is an integer number (21425934).

Almost surely, 2^42851867 is an apocalyptic number.

42851867 is a deficient number, since it is larger than the sum of its proper divisors (1).

42851867 is an equidigital number, since it uses as much as digits as its factorization.

42851867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 41.

The square root of 42851867 is about 6546.1337444327. The cubic root of 42851867 is about 349.9370417369.

The spelling of 42851867 in words is "forty-two million, eight hundred fifty-one thousand, eight hundred sixty-seven".