42011143 has 4 divisors (see below), whose sum is σ = 42026040. Its totient is φ = 41996248.

The previous prime is 42011119. The next prime is 42011153. The reversal of 42011143 is 34111024.

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-42011143 is a prime.

It is a super-2 number, since 2×42011143² = 3529872272332898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42011153) 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, 1780 + ... + 9337.

It is an arithmetic number, because the mean of its divisors is an integer number (10506510).

Almost surely, 2^42011143 is an apocalyptic number.

42011143 is a deficient number, since it is larger than the sum of its proper divisors (14897).

42011143 is a wasteful number, since it uses less digits than its factorization.

42011143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14896.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 42011143 is about 6481.6003425080. The cubic root of 42011143 is about 347.6334025362.

Adding to 42011143 its reverse (34111024), we get a palindrome (76122167).

The spelling of 42011143 in words is "forty-two million, eleven thousand, one hundred forty-three".