21414201 has 16 divisors (see below), whose sum is σ = 29131200. Its totient is φ = 13989888.

The previous prime is 21414193. The next prime is 21414221. The reversal of 21414201 is 10241412.

It is not a de Polignac number, because 21414201 - 2³ = 21414193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21414221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36825 + ... + 37401.

It is an arithmetic number, because the mean of its divisors is an integer number (1820700).

Almost surely, 2^21414201 is an apocalyptic number.

It is an amenable number.

21414201 is a deficient number, since it is larger than the sum of its proper divisors (7716999).

21414201 is a wasteful number, since it uses less digits than its factorization.

21414201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 21414201 is about 4627.5480548558. The cubic root of 21414201 is about 277.6945085461.

Adding to 21414201 its reverse (10241412), we get a palindrome (31655613).

The spelling of 21414201 in words is "twenty-one million, four hundred fourteen thousand, two hundred one".