42145045 has 16 divisors (see below), whose sum is σ = 51614640. Its totient is φ = 33030144.

The previous prime is 42145009. The next prime is 42145063. The reversal of 42145045 is 54054124.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 8898289 + 33246756 = 2983^2 + 5766^2 .

It is a cyclic number.

It is not a de Polignac number, because 42145045 - 2²¹ = 40047893 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54421 + ... + 55189.

It is an arithmetic number, because the mean of its divisors is an integer number (3225915).

Almost surely, 2^42145045 is an apocalyptic number.

It is an amenable number.

42145045 is a deficient number, since it is larger than the sum of its proper divisors (9469595).

42145045 is a wasteful number, since it uses less digits than its factorization.

42145045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 42145045 is about 6491.9215183180. The cubic root of 42145045 is about 348.0023478284.

Adding to 42145045 its reverse (54054124), we get a palindrome (96199169).

The spelling of 42145045 in words is "forty-two million, one hundred forty-five thousand, forty-five".