42144191 has 4 divisors (see below), whose sum is σ = 42265992. Its totient is φ = 42022392.

The previous prime is 42144161. The next prime is 42144217. The reversal of 42144191 is 19144124.

42144191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 348³-1.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42144191 is a prime.

It is a super-2 number, since 2×42144191² = 3552265670088962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42144191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42144121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60380 + ... + 61073.

It is an arithmetic number, because the mean of its divisors is an integer number (10566498).

Almost surely, 2^42144191 is an apocalyptic number.

42144191 is a deficient number, since it is larger than the sum of its proper divisors (121801).

42144191 is a wasteful number, since it uses less digits than its factorization.

42144191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121800.

The product of its digits is 1152, while the sum is 26.

The square root of 42144191 is about 6491.8557439302. The cubic root of 42144191 is about 347.9999972475. Note that the first 5 decimals are identical.

The spelling of 42144191 in words is "forty-two million, one hundred forty-four thousand, one hundred ninety-one".