42144243 has 4 divisors (see below), whose sum is σ = 56192328. Its totient is φ = 28096160.

The previous prime is 42144233. The next prime is 42144247. The reversal of 42144243 is 34244124.

It is a happy number.

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 42144243 - 2⁴ = 42144227 is a prime.

It is a super-2 number, since 2×42144243² = 3552274436086098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42144247) 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, 7024038 + ... + 7024043.

It is an arithmetic number, because the mean of its divisors is an integer number (14048082).

Almost surely, 2^42144243 is an apocalyptic number.

42144243 is a deficient number, since it is larger than the sum of its proper divisors (14048085).

42144243 is a wasteful number, since it uses less digits than its factorization.

42144243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14048084.

The product of its digits is 3072, while the sum is 24.

The square root of 42144243 is about 6491.8597489471. The cubic root of 42144243 is about 348.0001403752. Note that the first 3 decimals are identical.

Adding to 42144243 its reverse (34244124), we get a palindrome (76388367).

The spelling of 42144243 in words is "forty-two million, one hundred forty-four thousand, two hundred forty-three".