42578143 has 2 divisors, whose sum is σ = 42578144. Its totient is φ = 42578142.

The previous prime is 42578113. The next prime is 42578167. The reversal of 42578143 is 34187524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42578143 - 2⁵ = 42578111 is a prime.

It is a super-2 number, since 2×42578143² = 3625796522656898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42578099 and 42578108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42578113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21289071 + 21289072.

It is an arithmetic number, because the mean of its divisors is an integer number (21289072).

Almost surely, 2^42578143 is an apocalyptic number.

42578143 is a deficient number, since it is larger than the sum of its proper divisors (1).

42578143 is an equidigital number, since it uses as much as digits as its factorization.

42578143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 34.

The square root of 42578143 is about 6525.1929473388. The cubic root of 42578143 is about 349.1903543629.

The spelling of 42578143 in words is "forty-two million, five hundred seventy-eight thousand, one hundred forty-three".