42100271 has 4 divisors (see below), whose sum is σ = 42129000. Its totient is φ = 42071544.

The previous prime is 42100249. The next prime is 42100273. The reversal of 42100271 is 17200124.

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

It is a cyclic number.

It is not a de Polignac number, because 42100271 - 2⁶ = 42100207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42100273) 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, 12041 + ... + 15138.

It is an arithmetic number, because the mean of its divisors is an integer number (10532250).

Almost surely, 2^42100271 is an apocalyptic number.

42100271 is a deficient number, since it is larger than the sum of its proper divisors (28729).

42100271 is a wasteful number, since it uses less digits than its factorization.

42100271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28728.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 42100271 is about 6488.4721622274. The cubic root of 42100271 is about 347.8790673955.

Adding to 42100271 its reverse (17200124), we get a palindrome (59300395).

The spelling of 42100271 in words is "forty-two million, one hundred thousand, two hundred seventy-one".