42015445 has 4 divisors (see below), whose sum is σ = 50418540. Its totient is φ = 33612352.

The previous prime is 42015443. The next prime is 42015469. The reversal of 42015445 is 54451024.

It is a happy number.

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 24383844 + 17631601 = 4938^2 + 4199^2 .

It is a cyclic number.

It is not a de Polignac number, because 42015445 - 2¹ = 42015443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42015443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4201540 + ... + 4201549.

It is an arithmetic number, because the mean of its divisors is an integer number (12604635).

Almost surely, 2^42015445 is an apocalyptic number.

It is an amenable number.

42015445 is a deficient number, since it is larger than the sum of its proper divisors (8403095).

42015445 is an equidigital number, since it uses as much as digits as its factorization.

42015445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8403094.

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

The square root of 42015445 is about 6481.9321964982. The cubic root of 42015445 is about 347.6452681807.

Adding to 42015445 its reverse (54451024), we get a palindrome (96466469).

The spelling of 42015445 in words is "forty-two million, fifteen thousand, four hundred forty-five".