42070143 has 4 divisors (see below), whose sum is σ = 56093528. Its totient is φ = 28046760.

The previous prime is 42070117. The next prime is 42070159. The reversal of 42070143 is 34107024.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42070143 - 2¹⁷ = 41939071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42070103) 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, 7011688 + ... + 7011693.

It is an arithmetic number, because the mean of its divisors is an integer number (14023382).

Almost surely, 2^42070143 is an apocalyptic number.

42070143 is a deficient number, since it is larger than the sum of its proper divisors (14023385).

42070143 is a wasteful number, since it uses less digits than its factorization.

42070143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14023384.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 42070143 is about 6486.1500907703. The cubic root of 42070143 is about 347.7960639577.

Adding to 42070143 its reverse (34107024), we get a palindrome (76177167).

The spelling of 42070143 in words is "forty-two million, seventy thousand, one hundred forty-three".