42512440 has 32 divisors (see below), whose sum is σ = 97692480. Its totient is φ = 16642432.

The previous prime is 42512419. The next prime is 42512447. The reversal of 42512440 is 4421524.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42512447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9427 + ... + 13186.

It is an arithmetic number, because the mean of its divisors is an integer number (3052890).

Almost surely, 2^42512440 is an apocalyptic number.

42512440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42512440 is an abundant number, since it is smaller than the sum of its proper divisors (55180040).

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

42512440 is a wasteful number, since it uses less digits than its factorization.

42512440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22671 (or 22667 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 42512440 is about 6520.1564398410. The cubic root of 42512440 is about 349.0106481920.

Adding to 42512440 its reverse (4421524), we get a palindrome (46933964).

The spelling of 42512440 in words is "forty-two million, five hundred twelve thousand, four hundred forty".