42171801 has 24 divisors (see below), whose sum is σ = 66495744. Its totient is φ = 23698080.

The previous prime is 42171791. The next prime is 42171809. The reversal of 42171801 is 10817124.

It is not a de Polignac number, because 42171801 - 2⁵ = 42171769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42171809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6616 + ... + 11318.

It is an arithmetic number, because the mean of its divisors is an integer number (2770656).

Almost surely, 2^42171801 is an apocalyptic number.

It is an amenable number.

42171801 is a deficient number, since it is larger than the sum of its proper divisors (24323943).

42171801 is a wasteful number, since it uses less digits than its factorization.

42171801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4781 (or 4774 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 42171801 is about 6493.9819063499. The cubic root of 42171801 is about 348.0759759469.

Adding to 42171801 its reverse (10817124), we get a palindrome (52988925).

The spelling of 42171801 in words is "forty-two million, one hundred seventy-one thousand, eight hundred one".