42171386 has 8 divisors (see below), whose sum is σ = 63449184. Its totient is φ = 21021660.

The previous prime is 42171383. The next prime is 42171401. The reversal of 42171386 is 68317124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (42171383) 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, 31190 + ... + 32513.

It is an arithmetic number, because the mean of its divisors is an integer number (7931148).

Almost surely, 2^42171386 is an apocalyptic number.

42171386 is a deficient number, since it is larger than the sum of its proper divisors (21277798).

42171386 is a wasteful number, since it uses less digits than its factorization.

42171386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64036.

The product of its digits is 8064, while the sum is 32.

The square root of 42171386 is about 6493.9499536107. The cubic root of 42171386 is about 348.0748341729.

The spelling of 42171386 in words is "forty-two million, one hundred seventy-one thousand, three hundred eighty-six".