42521452 has 12 divisors (see below), whose sum is σ = 74458440. Its totient is φ = 21247616.

The previous prime is 42521443. The next prime is 42521459. The reversal of 42521452 is 25412524.

It is not an unprimeable number, because it can be changed into a prime (42521459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9948 + ... + 13564.

It is an arithmetic number, because the mean of its divisors is an integer number (6204870).

Almost surely, 2^42521452 is an apocalyptic number.

It is an amenable number.

42521452 is a deficient number, since it is larger than the sum of its proper divisors (31936988).

42521452 is a wasteful number, since it uses less digits than its factorization.

42521452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6560 (or 6558 counting only the distinct ones).

The product of its digits is 3200, while the sum is 25.

The square root of 42521452 is about 6520.8474909324. The cubic root of 42521452 is about 349.0353081247.

Adding to 42521452 its reverse (25412524), we get a palindrome (67933976).

The spelling of 42521452 in words is "forty-two million, five hundred twenty-one thousand, four hundred fifty-two".