42810520 has 32 divisors (see below), whose sum is σ = 96545520. Its totient is φ = 17084800.

The previous prime is 42810511. The next prime is 42810529. The reversal of 42810520 is 2501824.

It is an interprime number because it is at equal distance from previous prime (42810511) and next prime (42810529).

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 42810491 and 42810500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42810529) 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, 21570 + ... + 23470.

Almost surely, 2^42810520 is an apocalyptic number.

42810520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42810520 is an abundant number, since it is smaller than the sum of its proper divisors (53735000).

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

42810520 is a wasteful number, since it uses less digits than its factorization.

42810520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2475 (or 2471 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 42810520 is about 6542.9748585792. The cubic root of 42810520 is about 349.8244561877.

The spelling of 42810520 in words is "forty-two million, eight hundred ten thousand, five hundred twenty".