42149871 has 12 divisors (see below), whose sum is σ = 61071400. Its totient is φ = 28013040.

The previous prime is 42149857. The next prime is 42149873. The reversal of 42149871 is 17894124.

It is not a de Polignac number, because 42149871 - 2¹⁹ = 41625583 is a prime.

It is a super-2 number, since 2×42149871² = 3553223250633282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42149873) 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, 4096 + ... + 10053.

Almost surely, 2^42149871 is an apocalyptic number.

42149871 is a deficient number, since it is larger than the sum of its proper divisors (18921529).

42149871 is a wasteful number, since it uses less digits than its factorization.

42149871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14486 (or 14483 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 42149871 is about 6492.2932004031. The cubic root of 42149871 is about 348.0156304910.

The spelling of 42149871 in words is "forty-two million, one hundred forty-nine thousand, eight hundred seventy-one".