42513540 has 24 divisors (see below), whose sum is σ = 119038080. Its totient is φ = 11336928.

The previous prime is 42513533. The next prime is 42513563. The reversal of 42513540 is 4531524.

It is a self number, because there is not a number n which added to its sum of digits gives 42513540.

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, 354220 + ... + 354339.

It is an arithmetic number, because the mean of its divisors is an integer number (4959920).

Almost surely, 2^42513540 is an apocalyptic number.

It is an amenable number.

42513540 is an abundant number, since it is smaller than the sum of its proper divisors (76524540).

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

42513540 is a wasteful number, since it uses less digits than its factorization.

42513540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708571 (or 708569 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 42513540 is about 6520.2407930996. The cubic root of 42513540 is about 349.0136583572.

The spelling of 42513540 in words is "forty-two million, five hundred thirteen thousand, five hundred forty".