42122787 has 16 divisors (see below), whose sum is σ = 67963392. Its totient is φ = 22654080.

The previous prime is 42122779. The next prime is 42122803. The reversal of 42122787 is 78722124.

It is not a de Polignac number, because 42122787 - 2³ = 42122779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42122767) 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, 58639 + ... + 59352.

It is an arithmetic number, because the mean of its divisors is an integer number (4247712).

Almost surely, 2^42122787 is an apocalyptic number.

42122787 is a deficient number, since it is larger than the sum of its proper divisors (25840605).

42122787 is a wasteful number, since it uses less digits than its factorization.

42122787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118018.

The product of its digits is 12544, while the sum is 33.

The square root of 42122787 is about 6490.2070074844. The cubic root of 42122787 is about 347.9410737193.

The spelling of 42122787 in words is "forty-two million, one hundred twenty-two thousand, seven hundred eighty-seven".