21254452 has 12 divisors (see below), whose sum is σ = 37373056. Its totient is φ = 10576440.

The previous prime is 21254447. The next prime is 21254459. The reversal of 21254452 is 25445212.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21254459) 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, 11748 + ... + 13435.

Almost surely, 2^21254452 is an apocalyptic number.

It is an amenable number.

21254452 is a deficient number, since it is larger than the sum of its proper divisors (16118604).

21254452 is a wasteful number, since it uses less digits than its factorization.

21254452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25398 (or 25396 counting only the distinct ones).

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

The square root of 21254452 is about 4610.2550905563. The cubic root of 21254452 is about 277.0022546702.

Adding to 21254452 its reverse (25445212), we get a palindrome (46699664).

The spelling of 21254452 in words is "twenty-one million, two hundred fifty-four thousand, four hundred fifty-two".