42845787 has 8 divisors (see below), whose sum is σ = 63475280. Its totient is φ = 28563840.

The previous prime is 42845767. The next prime is 42845839. The reversal of 42845787 is 78754824.

It is not a de Polignac number, because 42845787 - 2⁶ = 42845723 is a prime.

It is a super-2 number, since 2×42845787² = 3671522927298738, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (42845767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 793414 + ... + 793467.

It is an arithmetic number, because the mean of its divisors is an integer number (7934410).

Almost surely, 2^42845787 is an apocalyptic number.

42845787 is a deficient number, since it is larger than the sum of its proper divisors (20629493).

42845787 is a wasteful number, since it uses less digits than its factorization.

42845787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586890 (or 1586884 counting only the distinct ones).

The product of its digits is 501760, while the sum is 45.

The square root of 42845787 is about 6545.6693317032. The cubic root of 42845787 is about 349.9204907829.

The spelling of 42845787 in words is "forty-two million, eight hundred forty-five thousand, seven hundred eighty-seven".