42555807 has 16 divisors (see below), whose sum is σ = 72052480. Its totient is φ = 24317496.

The previous prime is 42555803. The next prime is 42555817. The reversal of 42555807 is 70855524.

It is a happy number.

It is not a de Polignac number, because 42555807 - 2² = 42555803 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42555803) 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, 112393 + ... + 112770.

It is an arithmetic number, because the mean of its divisors is an integer number (4503280).

Almost surely, 2^42555807 is an apocalyptic number.

42555807 is a deficient number, since it is larger than the sum of its proper divisors (29496673).

42555807 is a wasteful number, since it uses less digits than its factorization.

42555807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225179 (or 225173 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 42555807 is about 6523.4812025482. The cubic root of 42555807 is about 349.1292832793.

The spelling of 42555807 in words is "forty-two million, five hundred fifty-five thousand, eight hundred seven".