42873851 has 2 divisors, whose sum is σ = 42873852. Its totient is φ = 42873850.

The previous prime is 42873841. The next prime is 42873871. The reversal of 42873851 is 15837824.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42873851 is a prime.

It is not a weakly prime, because it can be changed into another prime (42873841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21436925 + 21436926.

It is an arithmetic number, because the mean of its divisors is an integer number (21436926).

Almost surely, 2^42873851 is an apocalyptic number.

42873851 is a deficient number, since it is larger than the sum of its proper divisors (1).

42873851 is an equidigital number, since it uses as much as digits as its factorization.

42873851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 38.

The square root of 42873851 is about 6547.8126882189. The cubic root of 42873851 is about 349.9968734415.

The spelling of 42873851 in words is "forty-two million, eight hundred seventy-three thousand, eight hundred fifty-one".