42521232 has 80 divisors (see below), whose sum is σ = 119867328. Its totient is φ = 12910080.

The previous prime is 42521231. The next prime is 42521249. The reversal of 42521232 is 23212524.

It is a junction number, because it is equal to n+sod(n) for n = 42521199 and 42521208.

It is not an unprimeable number, because it can be changed into a prime (42521231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51382 + ... + 52202.

Almost surely, 2^42521232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42521232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59933664).

42521232 is an abundant number, since it is smaller than the sum of its proper divisors (77346096).

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

42521232 is a wasteful number, since it uses less digits than its factorization.

42521232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928 (or 922 counting only the distinct ones).

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

The square root of 42521232 is about 6520.8306219377. The cubic root of 42521232 is about 349.0347061705.

Adding to 42521232 its reverse (23212524), we get a palindrome (65733756).

The spelling of 42521232 in words is "forty-two million, five hundred twenty-one thousand, two hundred thirty-two".