21411452 has 12 divisors (see below), whose sum is σ = 38678976. Its totient is φ = 10360320.

The previous prime is 21411437. The next prime is 21411457. The reversal of 21411452 is 25411412.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411457) 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, 86213 + ... + 86460.

It is an arithmetic number, because the mean of its divisors is an integer number (3223248).

Almost surely, 2^21411452 is an apocalyptic number.

It is an amenable number.

21411452 is a deficient number, since it is larger than the sum of its proper divisors (17267524).

21411452 is a wasteful number, since it uses less digits than its factorization.

21411452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172708 (or 172706 counting only the distinct ones).

The product of its digits is 320, while the sum is 20.

The square root of 21411452 is about 4627.2510197741. The cubic root of 21411452 is about 277.6826252345.

Adding to 21411452 its reverse (25411412), we get a palindrome (46822864).

The spelling of 21411452 in words is "twenty-one million, four hundred eleven thousand, four hundred fifty-two".