42239785 has 16 divisors (see below), whose sum is σ = 58496256. Its totient is φ = 28680768.

The previous prime is 42239783. The next prime is 42239801. The reversal of 42239785 is 58793224.

It is a cyclic number.

It is not a de Polignac number, because 42239785 - 2¹ = 42239783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42239783) 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, 2254 + ... + 9463.

It is an arithmetic number, because the mean of its divisors is an integer number (3656016).

Almost surely, 2^42239785 is an apocalyptic number.

It is an amenable number.

42239785 is a deficient number, since it is larger than the sum of its proper divisors (16256471).

42239785 is a wasteful number, since it uses less digits than its factorization.

42239785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11832.

The product of its digits is 120960, while the sum is 40.

The square root of 42239785 is about 6499.2141832686. The cubic root of 42239785 is about 348.2629167633.

The spelling of 42239785 in words is "forty-two million, two hundred thirty-nine thousand, seven hundred eighty-five".