21482401 has 8 divisors (see below), whose sum is σ = 22224384. Its totient is φ = 20750880.

The previous prime is 21482387. The next prime is 21482491. The reversal of 21482401 is 10428412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21482401 - 2⁷ = 21482273 is a prime.

It is a super-2 number, since 2×21482401² = 922987105449602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21482491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1680 + ... + 6766.

It is an arithmetic number, because the mean of its divisors is an integer number (2778048).

Almost surely, 2^21482401 is an apocalyptic number.

It is an amenable number.

21482401 is a deficient number, since it is larger than the sum of its proper divisors (741983).

21482401 is a wasteful number, since it uses less digits than its factorization.

21482401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5231.

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 21482401 is about 4634.9111102588. The cubic root of 21482401 is about 277.9889968559.

The spelling of 21482401 in words is "twenty-one million, four hundred eighty-two thousand, four hundred one".