42398871 has 4 divisors (see below), whose sum is σ = 56531832. Its totient is φ = 28265912.

The previous prime is 42398827. The next prime is 42398893. The reversal of 42398871 is 17889324.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42398871 - 2⁷ = 42398743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42398801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7066476 + ... + 7066481.

It is an arithmetic number, because the mean of its divisors is an integer number (14132958).

Almost surely, 2^42398871 is an apocalyptic number.

42398871 is a deficient number, since it is larger than the sum of its proper divisors (14132961).

42398871 is a wasteful number, since it uses less digits than its factorization.

42398871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14132960.

The product of its digits is 96768, while the sum is 42.

The square root of 42398871 is about 6511.4415454644. The cubic root of 42398871 is about 348.6995852151.

The spelling of 42398871 in words is "forty-two million, three hundred ninety-eight thousand, eight hundred seventy-one".