42440505 has 8 divisors (see below), whose sum is σ = 67904832. Its totient is φ = 22634928.

The previous prime is 42440423. The next prime is 42440537. The reversal of 42440505 is 50504424.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42440505 - 2⁸ = 42440249 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1414669 + ... + 1414698.

It is an arithmetic number, because the mean of its divisors is an integer number (8488104).

Almost surely, 2^42440505 is an apocalyptic number.

It is an amenable number.

42440505 is a deficient number, since it is larger than the sum of its proper divisors (25464327).

42440505 is a wasteful number, since it uses less digits than its factorization.

42440505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2829375.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 42440505 is about 6514.6377489466. The cubic root of 42440505 is about 348.8136842373.

Adding to 42440505 its reverse (50504424), we get a palindrome (92944929).

The spelling of 42440505 in words is "forty-two million, four hundred forty thousand, five hundred five".