21416061 has 8 divisors (see below), whose sum is σ = 28596640. Its totient is φ = 14256432.

The previous prime is 21416053. The next prime is 21416089. The reversal of 21416061 is 16061412.

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

It is not a de Polignac number, because 21416061 - 2³ = 21416053 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21416051) 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, 2671 + ... + 7068.

It is an arithmetic number, because the mean of its divisors is an integer number (3574580).

Almost surely, 2^21416061 is an apocalyptic number.

It is an amenable number.

21416061 is a deficient number, since it is larger than the sum of its proper divisors (7180579).

21416061 is an equidigital number, since it uses as much as digits as its factorization.

21416061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10475.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 21416061 is about 4627.7490208524. The cubic root of 21416061 is about 277.7025483329.

Adding to 21416061 its reverse (16061412), we get a palindrome (37477473).

The spelling of 21416061 in words is "twenty-one million, four hundred sixteen thousand, sixty-one".