42866805 has 16 divisors (see below), whose sum is σ = 68987520. Its totient is φ = 22728768.

The previous prime is 42866783. The next prime is 42866807. The reversal of 42866805 is 50866824.

It is a de Polignac number, because none of the positive numbers 2^k-42866805 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42866807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5665 + ... + 10854.

It is an arithmetic number, because the mean of its divisors is an integer number (4311720).

Almost surely, 2^42866805 is an apocalyptic number.

It is an amenable number.

42866805 is a deficient number, since it is larger than the sum of its proper divisors (26120715).

42866805 is a wasteful number, since it uses less digits than its factorization.

42866805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16700.

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 42866805 is about 6547.2746238416. The cubic root of 42866805 is about 349.9776992594.

The spelling of 42866805 in words is "forty-two million, eight hundred sixty-six thousand, eight hundred five".