42281787 has 8 divisors (see below), whose sum is σ = 57899536. Its totient is φ = 27425952.

The previous prime is 42281761. The next prime is 42281791. The reversal of 42281787 is 78718224.

42281787 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42281787 - 2¹⁴ = 42265403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42281747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190348 + ... + 190569.

It is an arithmetic number, because the mean of its divisors is an integer number (7237442).

Almost surely, 2^42281787 is an apocalyptic number.

42281787 is a deficient number, since it is larger than the sum of its proper divisors (15617749).

42281787 is a wasteful number, since it uses less digits than its factorization.

42281787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380957.

The product of its digits is 50176, while the sum is 39.

The square root of 42281787 is about 6502.4446941131. Note that the first 3 decimals coincide. The cubic root of 42281787 is about 348.3783126571.

The spelling of 42281787 in words is "forty-two million, two hundred eighty-one thousand, seven hundred eighty-seven".