42100520 has 64 divisors (see below), whose sum is σ = 118108800. Its totient is φ = 13121280.

The previous prime is 42100519. The next prime is 42100543. The reversal of 42100520 is 2500124.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 42100495 and 42100504.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3755 + ... + 9914.

It is an arithmetic number, because the mean of its divisors is an integer number (1845450).

Almost surely, 2^42100520 is an apocalyptic number.

42100520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42100520 is an abundant number, since it is smaller than the sum of its proper divisors (76008280).

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

42100520 is a wasteful number, since it uses less digits than its factorization.

42100520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13698 (or 13694 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 42100520 is about 6488.4913500751. The cubic root of 42100520 is about 347.8797532321.

Adding to 42100520 its reverse (2500124), we get a palindrome (44600644).

The spelling of 42100520 in words is "forty-two million, one hundred thousand, five hundred twenty".