42143091 has 4 divisors (see below), whose sum is σ = 56190792. Its totient is φ = 28095392.

The previous prime is 42143089. The next prime is 42143141. The reversal of 42143091 is 19034124.

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

It is a cyclic number.

It is not a de Polignac number, because 42143091 - 2¹ = 42143089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42143081) 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, 7023846 + ... + 7023851.

It is an arithmetic number, because the mean of its divisors is an integer number (14047698).

Almost surely, 2^42143091 is an apocalyptic number.

42143091 is a deficient number, since it is larger than the sum of its proper divisors (14047701).

42143091 is a wasteful number, since it uses less digits than its factorization.

42143091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14047700.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 42143091 is about 6491.7710218399. The cubic root of 42143091 is about 347.9969695204.

The spelling of 42143091 in words is "forty-two million, one hundred forty-three thousand, ninety-one".