42744135 has 32 divisors (see below), whose sum is σ = 79165440. Its totient is φ = 19289088.

The previous prime is 42744131. The next prime is 42744157. The reversal of 42744135 is 53144724.

It is not a de Polignac number, because 42744135 - 2² = 42744131 is a prime.

It is a super-2 number, since 2×42744135² = 3654122153796450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42744131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5719 + ... + 10871.

It is an arithmetic number, because the mean of its divisors is an integer number (2473920).

Almost surely, 2^42744135 is an apocalyptic number.

42744135 is a deficient number, since it is larger than the sum of its proper divisors (36421305).

42744135 is a wasteful number, since it uses less digits than its factorization.

42744135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5247.

The product of its digits is 13440, while the sum is 30.

The square root of 42744135 is about 6537.8998921672. The cubic root of 42744135 is about 349.6435418497.

Adding to 42744135 its reverse (53144724), we get a palindrome (95888859).

The spelling of 42744135 in words is "forty-two million, seven hundred forty-four thousand, one hundred thirty-five".