42052440 has 32 divisors (see below), whose sum is σ = 126157680. Its totient is φ = 11213952.

The previous prime is 42052403. The next prime is 42052447. The reversal of 42052440 is 4425024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42052447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175099 + ... + 175338.

Almost surely, 2^42052440 is an apocalyptic number.

42052440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42052440 is an abundant number, since it is smaller than the sum of its proper divisors (84105240).

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

42052440 is a wasteful number, since it uses less digits than its factorization.

42052440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350451 (or 350447 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 42052440 is about 6484.7852701535. The cubic root of 42052440 is about 347.7472732390.

Adding to 42052440 its reverse (4425024), we get a palindrome (46477464).

The spelling of 42052440 in words is "forty-two million, fifty-two thousand, four hundred forty".