42042985 has 4 divisors (see below), whose sum is σ = 50451588. Its totient is φ = 33634384.

The previous prime is 42042961. The next prime is 42043003. The reversal of 42042985 is 58924024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15303744 + 26739241 = 3912^2 + 5171^2 .

It is a cyclic number.

It is not a de Polignac number, because 42042985 - 2¹⁷ = 41911913 is a prime.

It is a super-2 number, since 2×42042985² = 3535225175420450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42042985.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4204294 + ... + 4204303.

It is an arithmetic number, because the mean of its divisors is an integer number (12612897).

Almost surely, 2^42042985 is an apocalyptic number.

It is an amenable number.

42042985 is a deficient number, since it is larger than the sum of its proper divisors (8408603).

42042985 is an equidigital number, since it uses as much as digits as its factorization.

42042985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8408602.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 42042985 is about 6484.0562150555. The cubic root of 42042985 is about 347.7212089812.

The spelling of 42042985 in words is "forty-two million, forty-two thousand, nine hundred eighty-five".