42520104 has 96 divisors (see below), whose sum is σ = 129111840. Its totient is φ = 12528000.

The previous prime is 42520097. The next prime is 42520117. The reversal of 42520104 is 40102524.

42520104 is a `hidden beast` number, since 42 + 520 + 104 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28579 + ... + 30029.

It is an arithmetic number, because the mean of its divisors is an integer number (1344915).

Almost surely, 2^42520104 is an apocalyptic number.

42520104 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42520104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64555920).

42520104 is an abundant number, since it is smaller than the sum of its proper divisors (86591736).

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

42520104 is a wasteful number, since it uses less digits than its factorization.

42520104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511 (or 1504 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 42520104 is about 6520.7441293153. The cubic root of 42520104 is about 349.0316197545.

Adding to 42520104 its reverse (40102524), we get a palindrome (82622628).

It can be divided in two parts, 42520 and 104, that added together give a palindrome (42624).

The spelling of 42520104 in words is "forty-two million, five hundred twenty thousand, one hundred four".