42747845 has 12 divisors (see below), whose sum is σ = 59672844. Its totient is φ = 29312640.

The previous prime is 42747841. The next prime is 42747907. The reversal of 42747845 is 54874724.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15697444 + 27050401 = 3962^2 + 5201^2 .

It is not a de Polignac number, because 42747845 - 2² = 42747841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42747841) 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, 86996 + ... + 87485.

It is an arithmetic number, because the mean of its divisors is an integer number (4972737).

Almost surely, 2^42747845 is an apocalyptic number.

It is an amenable number.

42747845 is a deficient number, since it is larger than the sum of its proper divisors (16924999).

42747845 is a wasteful number, since it uses less digits than its factorization.

42747845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174500 (or 174493 counting only the distinct ones).

The product of its digits is 250880, while the sum is 41.

The square root of 42747845 is about 6538.1836162653. The cubic root of 42747845 is about 349.6536573896.

The spelling of 42747845 in words is "forty-two million, seven hundred forty-seven thousand, eight hundred forty-five".