42240412 has 6 divisors (see below), whose sum is σ = 73920728. Its totient is φ = 21120204.

The previous prime is 42240409. The next prime is 42240413. The reversal of 42240412 is 21404224.

It is a self number, because there is not a number n which added to its sum of digits gives 42240412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42240413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5280048 + ... + 5280055.

Almost surely, 2^42240412 is an apocalyptic number.

It is an amenable number.

42240412 is a deficient number, since it is larger than the sum of its proper divisors (31680316).

42240412 is a wasteful number, since it uses less digits than its factorization.

42240412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10560107 (or 10560105 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 42240412 is about 6499.2624196904. The cubic root of 42240412 is about 348.2646399394.

Adding to 42240412 its reverse (21404224), we get a palindrome (63644636).

The spelling of 42240412 in words is "forty-two million, two hundred forty thousand, four hundred twelve".