42564191 has 8 divisors (see below), whose sum is σ = 45499104. Its totient is φ = 39719680.

The previous prime is 42564169. The next prime is 42564217. The reversal of 42564191 is 19146524.

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

It is a cyclic number.

It is not a de Polignac number, because 42564191 - 2¹⁰ = 42563167 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 (42564101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21626 + ... + 23511.

It is an arithmetic number, because the mean of its divisors is an integer number (5687388).

Almost surely, 2^42564191 is an apocalyptic number.

42564191 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

42564191 is a deficient number, since it is larger than the sum of its proper divisors (2934913).

42564191 is a wasteful number, since it uses less digits than its factorization.

42564191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45201.

The product of its digits is 8640, while the sum is 32.

The square root of 42564191 is about 6524.1237725843. The cubic root of 42564191 is about 349.1522093139.

The spelling of 42564191 in words is "forty-two million, five hundred sixty-four thousand, one hundred ninety-one".