21428301 has 8 divisors (see below), whose sum is σ = 28594720. Its totient is φ = 14273712.

The previous prime is 21428243. The next prime is 21428317. The reversal of 21428301 is 10382412.

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

It is not a de Polignac number, because 21428301 - 2¹¹ = 21426253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21428401) 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, 2970 + ... + 7188.

It is an arithmetic number, because the mean of its divisors is an integer number (3574340).

Almost surely, 2^21428301 is an apocalyptic number.

It is an amenable number.

21428301 is a deficient number, since it is larger than the sum of its proper divisors (7166419).

21428301 is a wasteful number, since it uses less digits than its factorization.

21428301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5915.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 21428301 is about 4629.0712891465. The cubic root of 21428301 is about 277.7554437095.

The spelling of 21428301 in words is "twenty-one million, four hundred twenty-eight thousand, three hundred one".