42864145 has 4 divisors (see below), whose sum is σ = 51436980. Its totient is φ = 34291312.

The previous prime is 42864139. The next prime is 42864161. The reversal of 42864145 is 54146824.

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

It can be written as a sum of positive squares in 2 ways, for example, as 32216976 + 10647169 = 5676^2 + 3263^2 .

It is a cyclic number.

It is not a de Polignac number, because 42864145 - 2³ = 42864137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42864145.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4286410 + ... + 4286419.

It is an arithmetic number, because the mean of its divisors is an integer number (12859245).

Almost surely, 2^42864145 is an apocalyptic number.

It is an amenable number.

42864145 is a deficient number, since it is larger than the sum of its proper divisors (8572835).

42864145 is an equidigital number, since it uses as much as digits as its factorization.

42864145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8572834.

The product of its digits is 30720, while the sum is 34.

The square root of 42864145 is about 6547.0714827318. The cubic root of 42864145 is about 349.9704600919.

The spelling of 42864145 in words is "forty-two million, eight hundred sixty-four thousand, one hundred forty-five".