42209672 has 12 divisors (see below), whose sum is σ = 79177605. Its totient is φ = 21095648.

The previous prime is 42209639. The next prime is 42209683. The reversal of 42209672 is 27690224.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 42172036 + 37636 = 6494^2 + 194^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=4594.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 17228 + ... + 19524.

Almost surely, 2^42209672 is an apocalyptic number.

It is an amenable number.

42209672 is a deficient number, since it is larger than the sum of its proper divisors (36967933).

42209672 is an frugal number, since it uses more digits than its factorization.

42209672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4600 (or 2299 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 42209672 is about 6496.8971055420. The cubic root of 42209672 is about 348.1801375040.

Multiplying 42209672 by its sum of digits (32), we get a square (1350709504 = 36752²).

Adding to 42209672 its reverse (27690224), we get a palindrome (69899896).

The spelling of 42209672 in words is "forty-two million, two hundred nine thousand, six hundred seventy-two".