42431272 has 16 divisors (see below), whose sum is σ = 85678740. Its totient is φ = 19583616.

The previous prime is 42431261. The next prime is 42431273. The reversal of 42431272 is 27213424.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 36409156 + 6022116 = 6034^2 + 2454^2 .

It is not an unprimeable number, because it can be changed into a prime (42431273) 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, 203893 + ... + 204100.

Almost surely, 2^42431272 is an apocalyptic number.

It is an amenable number.

42431272 is an abundant number, since it is smaller than the sum of its proper divisors (43247468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42431272 is a wasteful number, since it uses less digits than its factorization.

42431272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408012 (or 408008 counting only the distinct ones).

The product of its digits is 2688, while the sum is 25.

The square root of 42431272 is about 6513.9290754505. The cubic root of 42431272 is about 348.7883874104.

Adding to 42431272 its reverse (27213424), we get a palindrome (69644696).

The spelling of 42431272 in words is "forty-two million, four hundred thirty-one thousand, two hundred seventy-two".