42806905 has 8 divisors (see below), whose sum is σ = 54072000. Its totient is φ = 32443056.

The previous prime is 42806899. The next prime is 42806921. The reversal of 42806905 is 50960824.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42806905 - 2⁵ = 42806873 is a prime.

It is a super-2 number, since 2×42806905² = 3664862231358050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225205 + ... + 225394.

It is an arithmetic number, because the mean of its divisors is an integer number (6759000).

Almost surely, 2^42806905 is an apocalyptic number.

It is an amenable number.

42806905 is a deficient number, since it is larger than the sum of its proper divisors (11265095).

42806905 is a wasteful number, since it uses less digits than its factorization.

42806905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450623.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 42806905 is about 6542.6986022589. The cubic root of 42806905 is about 349.8146093012.

The spelling of 42806905 in words is "forty-two million, eight hundred six thousand, nine hundred five".