42401143 has 2 divisors, whose sum is σ = 42401144. Its totient is φ = 42401142.

The previous prime is 42401137. The next prime is 42401153. The reversal of 42401143 is 34110424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42401143 - 2¹⁷ = 42270071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42401143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42401153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21200571 + 21200572.

It is an arithmetic number, because the mean of its divisors is an integer number (21200572).

Almost surely, 2^42401143 is an apocalyptic number.

42401143 is a deficient number, since it is larger than the sum of its proper divisors (1).

42401143 is an equidigital number, since it uses as much as digits as its factorization.

42401143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 42401143 is about 6511.6160052632. The cubic root of 42401143 is about 348.7058136145.

Adding to 42401143 its reverse (34110424), we get a palindrome (76511567).

The spelling of 42401143 in words is "forty-two million, four hundred one thousand, one hundred forty-three".