42709244 has 12 divisors (see below), whose sum is σ = 74794944. Its totient is φ = 21339264.

The previous prime is 42709243. The next prime is 42709267. The reversal of 42709244 is 44290724.

It is a self number, because there is not a number n which added to its sum of digits gives 42709244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42709243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4364 + ... + 10220.

It is an arithmetic number, because the mean of its divisors is an integer number (6232912).

Almost surely, 2^42709244 is an apocalyptic number.

It is an amenable number.

42709244 is a deficient number, since it is larger than the sum of its proper divisors (32085700).

42709244 is a wasteful number, since it uses less digits than its factorization.

42709244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7684 (or 7682 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 42709244 is about 6535.2309829110. The cubic root of 42709244 is about 349.5483807733.

Adding to 42709244 its reverse (44290724), we get a palindrome (86999968).

The spelling of 42709244 in words is "forty-two million, seven hundred nine thousand, two hundred forty-four".