21416141 has 8 divisors (see below), whose sum is σ = 22902264. Its totient is φ = 19955200.

The previous prime is 21416117. The next prime is 21416167. The reversal of 21416141 is 14161412.

It can be written as a sum of positive squares in 4 ways, for example, as 13875625 + 7540516 = 3725^2 + 2746^2 .

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 21416141 - 2²² = 17221837 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21416111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4520 + ... + 7953.

It is an arithmetic number, because the mean of its divisors is an integer number (2862783).

Almost surely, 2^21416141 is an apocalyptic number.

It is an amenable number.

21416141 is a deficient number, since it is larger than the sum of its proper divisors (1486123).

21416141 is a wasteful number, since it uses less digits than its factorization.

21416141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12591.

The product of its digits is 192, while the sum is 20.

The square root of 21416141 is about 4627.7576643554. The cubic root of 21416141 is about 277.7028941198.

Adding to 21416141 its reverse (14161412), we get a palindrome (35577553).

The spelling of 21416141 in words is "twenty-one million, four hundred sixteen thousand, one hundred forty-one".