42871851 has 12 divisors (see below), whose sum is σ = 67555800. Its totient is φ = 25982880.

The previous prime is 42871823. The next prime is 42871877. The reversal of 42871851 is 15817824.

It is not a de Polignac number, because 42871851 - 2¹³ = 42863659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42871811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 216426 + ... + 216623.

It is an arithmetic number, because the mean of its divisors is an integer number (5629650).

Almost surely, 2^42871851 is an apocalyptic number.

42871851 is a deficient number, since it is larger than the sum of its proper divisors (24683949).

42871851 is a wasteful number, since it uses less digits than its factorization.

42871851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433066 (or 433063 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 42871851 is about 6547.6599636817. The cubic root of 42871851 is about 349.9914310827.

The spelling of 42871851 in words is "forty-two million, eight hundred seventy-one thousand, eight hundred fifty-one".