42072224 has 24 divisors (see below), whose sum is σ = 83387808. Its totient is φ = 20894400.

The previous prime is 42072223. The next prime is 42072253. The reversal of 42072224 is 42227024.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 42072224.

It is not an unprimeable number, because it can be changed into a prime (42072223) 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, 479 + ... + 9185.

It is an arithmetic number, because the mean of its divisors is an integer number (3474492).

Almost surely, 2^42072224 is an apocalyptic number.

It is an amenable number.

42072224 is a deficient number, since it is larger than the sum of its proper divisors (41315584).

42072224 is a wasteful number, since it uses less digits than its factorization.

42072224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8868 (or 8860 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 42072224 is about 6486.3105075227. The cubic root of 42072224 is about 347.8017984417.

Adding to 42072224 its reverse (42227024), we get a palindrome (84299248).

The spelling of 42072224 in words is "forty-two million, seventy-two thousand, two hundred twenty-four".