42491485 has 4 divisors (see below), whose sum is σ = 50989788. Its totient is φ = 33993184.

The previous prime is 42491473. The next prime is 42491489. The reversal of 42491485 is 58419424.

42491485 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 18344089 + 24147396 = 4283^2 + 4914^2 .

It is a cyclic number.

It is not a de Polignac number, because 42491485 - 2⁵ = 42491453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42491489) 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 3 ways as a sum of consecutive naturals, for example, 4249144 + ... + 4249153.

It is an arithmetic number, because the mean of its divisors is an integer number (12747447).

Almost surely, 2^42491485 is an apocalyptic number.

It is an amenable number.

42491485 is a deficient number, since it is larger than the sum of its proper divisors (8498303).

42491485 is an equidigital number, since it uses as much as digits as its factorization.

42491485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8498302.

The product of its digits is 46080, while the sum is 37.

The square root of 42491485 is about 6518.5493018002. The cubic root of 42491485 is about 348.9532946259.

The spelling of 42491485 in words is "forty-two million, four hundred ninety-one thousand, four hundred eighty-five".