42740005 has 24 divisors (see below), whose sum is σ = 65089440. Its totient is φ = 26641440.

The previous prime is 42739969. The next prime is 42740017. The reversal of 42740005 is 50004724.

It is not a de Polignac number, because 42740005 - 2¹¹ = 42737957 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5235 + ... + 10624.

It is an arithmetic number, because the mean of its divisors is an integer number (2712060).

Almost surely, 2^42740005 is an apocalyptic number.

It is an amenable number.

42740005 is a deficient number, since it is larger than the sum of its proper divisors (22349435).

42740005 is a wasteful number, since it uses less digits than its factorization.

42740005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15889 (or 15882 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 42740005 is about 6537.5840338767. The cubic root of 42740005 is about 349.6322804658.

Adding to 42740005 its reverse (50004724), we get a palindrome (92744729).

It can be divided in two parts, 42 and 740005, that added together give a palindrome (740047).

The spelling of 42740005 in words is "forty-two million, seven hundred forty thousand, five".