42387785 has 16 divisors (see below), whose sum is σ = 55674432. Its totient is φ = 30724800.

The previous prime is 42387743. The next prime is 42387799. The reversal of 42387785 is 58778324.

It is a happy number.

It is not a de Polignac number, because 42387785 - 2¹² = 42383689 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17975 + ... + 20195.

It is an arithmetic number, because the mean of its divisors is an integer number (3479652).

Almost surely, 2^42387785 is an apocalyptic number.

It is an amenable number.

42387785 is a deficient number, since it is larger than the sum of its proper divisors (13286647).

42387785 is a wasteful number, since it uses less digits than its factorization.

42387785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584.

The product of its digits is 376320, while the sum is 44.

The square root of 42387785 is about 6510.5902190201. The cubic root of 42387785 is about 348.6691911623.

The spelling of 42387785 in words is "forty-two million, three hundred eighty-seven thousand, seven hundred eighty-five".