42170911 has 4 divisors (see below), whose sum is σ = 42704800. Its totient is φ = 41637024.

The previous prime is 42170893. The next prime is 42170941. The reversal of 42170911 is 11907124.

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 42170911 - 2⁷ = 42170783 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 (42170941) 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, 266826 + ... + 266983.

It is an arithmetic number, because the mean of its divisors is an integer number (10676200).

Almost surely, 2^42170911 is an apocalyptic number.

42170911 is a deficient number, since it is larger than the sum of its proper divisors (533889).

42170911 is an equidigital number, since it uses as much as digits as its factorization.

42170911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533888.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 42170911 is about 6493.9133810053. The cubic root of 42170911 is about 348.0735273139.

The spelling of 42170911 in words is "forty-two million, one hundred seventy thousand, nine hundred eleven".