42312540 has 24 divisors (see below), whose sum is σ = 118475280. Its totient is φ = 11283328.

The previous prime is 42312539. The next prime is 42312553. The reversal of 42312540 is 4521324.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352545 + ... + 352664.

It is an arithmetic number, because the mean of its divisors is an integer number (4936470).

Almost surely, 2^42312540 is an apocalyptic number.

It is an amenable number.

42312540 is an abundant number, since it is smaller than the sum of its proper divisors (76162740).

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

42312540 is a wasteful number, since it uses less digits than its factorization.

42312540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705221 (or 705219 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 42312540 is about 6504.8089902779. The cubic root of 42312540 is about 348.4627547032.

Adding to 42312540 its reverse (4521324), we get a palindrome (46833864).

The spelling of 42312540 in words is "forty-two million, three hundred twelve thousand, five hundred forty".