42171134 has 4 divisors (see below), whose sum is σ = 63256704. Its totient is φ = 21085566.

The previous prime is 42171131. The next prime is 42171163. The reversal of 42171134 is 43117124.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42171131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10542782 + ... + 10542785.

It is an arithmetic number, because the mean of its divisors is an integer number (15814176).

Almost surely, 2^42171134 is an apocalyptic number.

42171134 is a deficient number, since it is larger than the sum of its proper divisors (21085570).

42171134 is a wasteful number, since it uses less digits than its factorization.

42171134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21085569.

The product of its digits is 672, while the sum is 23.

The square root of 42171134 is about 6493.9305509067. The cubic root of 42171134 is about 348.0741408510.

Adding to 42171134 its reverse (43117124), we get a palindrome (85288258).

The spelling of 42171134 in words is "forty-two million, one hundred seventy-one thousand, one hundred thirty-four".