42245613 has 12 divisors (see below), whose sum is σ = 61277788. Its totient is φ = 28045440.

The previous prime is 42245563. The next prime is 42245617. The reversal of 42245613 is 31654224.

42245613 is a `hidden beast` number, since 4 + 2 + 2 + 45 + 613 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 30935844 + 11309769 = 5562^2 + 3363^2 .

It is not a de Polignac number, because 42245613 - 2⁹ = 42245101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42245617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7570 + ... + 11907.

Almost surely, 2^42245613 is an apocalyptic number.

It is an amenable number.

42245613 is a deficient number, since it is larger than the sum of its proper divisors (19032175).

42245613 is a wasteful number, since it uses less digits than its factorization.

42245613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19724 (or 19721 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 42245613 is about 6499.6625297011. The cubic root of 42245613 is about 348.2789331243.

Adding to 42245613 its reverse (31654224), we get a palindrome (73899837).

The spelling of 42245613 in words is "forty-two million, two hundred forty-five thousand, six hundred thirteen".