21412801 has 2 divisors, whose sum is σ = 21412802. Its totient is φ = 21412800.

The previous prime is 21412799. The next prime is 21412823. The reversal of 21412801 is 10821412.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11553201 + 9859600 = 3399^2 + 3140^2 .

It is a cyclic number.

It is not a de Polignac number, because 21412801 - 2¹ = 21412799 is a prime.

Together with 21412799, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1354420 and since 21412801 and 1354420 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (21412301) 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 as a sum of consecutive naturals, namely, 10706400 + 10706401.

It is an arithmetic number, because the mean of its divisors is an integer number (10706401).

Almost surely, 2^21412801 is an apocalyptic number.

It is an amenable number.

21412801 is a deficient number, since it is larger than the sum of its proper divisors (1).

21412801 is an equidigital number, since it uses as much as digits as its factorization.

21412801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 21412801 is about 4627.3967843702. The cubic root of 21412801 is about 277.6884567866.

The spelling of 21412801 in words is "twenty-one million, four hundred twelve thousand, eight hundred one".