42787143 has 24 divisors (see below), whose sum is σ = 73739760. Its totient is φ = 24449040.

The previous prime is 42787139. The next prime is 42787163. The reversal of 42787143 is 34178724.

It is a happy number.

It is not a de Polignac number, because 42787143 - 2² = 42787139 is a prime.

It is a super-2 number, since 2×42787143² = 3661479212204898, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 42787098 and 42787107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42787123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14848 + ... + 17493.

It is an arithmetic number, because the mean of its divisors is an integer number (3072490).

Almost surely, 2^42787143 is an apocalyptic number.

42787143 is a deficient number, since it is larger than the sum of its proper divisors (30952617).

42787143 is a wasteful number, since it uses less digits than its factorization.

42787143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32364 (or 32351 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 42787143 is about 6541.1881948160. The cubic root of 42787143 is about 349.7607698533.

The spelling of 42787143 in words is "forty-two million, seven hundred eighty-seven thousand, one hundred forty-three".