42861897 has 12 divisors (see below), whose sum is σ = 66674244. Its totient is φ = 26376480.

The previous prime is 42861893. The next prime is 42861911. The reversal of 42861897 is 79816824.

42861897 is a `hidden beast` number, since 4 + 28 + 618 + 9 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4372281 + 38489616 = 2091^2 + 6204^2 .

It is not a de Polignac number, because 42861897 - 2² = 42861893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42861893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183054 + ... + 183287.

It is an arithmetic number, because the mean of its divisors is an integer number (5556187).

Almost surely, 2^42861897 is an apocalyptic number.

It is an amenable number.

42861897 is a deficient number, since it is larger than the sum of its proper divisors (23812347).

42861897 is a wasteful number, since it uses less digits than its factorization.

42861897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366360 (or 366357 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 42861897 is about 6546.8998006690. The cubic root of 42861897 is about 349.9643419455.

The spelling of 42861897 in words is "forty-two million, eight hundred sixty-one thousand, eight hundred ninety-seven".