42440545 has 32 divisors (see below), whose sum is σ = 60092928. Its totient is φ = 28174848.

The previous prime is 42440539. The next prime is 42440557. The reversal of 42440545 is 54504424.

42440545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 42440545 - 2³ = 42440537 is a prime.

It is a nialpdrome in base 9.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 254052 + ... + 254218.

It is an arithmetic number, because the mean of its divisors is an integer number (1877904).

Almost surely, 2^42440545 is an apocalyptic number.

It is an amenable number.

42440545 is a deficient number, since it is larger than the sum of its proper divisors (17652383).

42440545 is a wasteful number, since it uses less digits than its factorization.

42440545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369.

The product of its (nonzero) digits is 12800, while the sum is 28.

The square root of 42440545 is about 6514.6408189554. The cubic root of 42440545 is about 348.8137938224.

Adding to 42440545 its reverse (54504424), we get a palindrome (96944969).

The spelling of 42440545 in words is "forty-two million, four hundred forty thousand, five hundred forty-five".