21412141 has 8 divisors (see below), whose sum is σ = 21874104. Its totient is φ = 20954880.

The previous prime is 21412133. The next prime is 21412177. The reversal of 21412141 is 14121412.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10055241 + 11356900 = 3171^2 + 3370^2 .

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 21412141 - 2³ = 21412133 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21412441) 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, 8931 + ... + 11071.

It is an arithmetic number, because the mean of its divisors is an integer number (2734263).

Almost surely, 2^21412141 is an apocalyptic number.

It is an amenable number.

21412141 is a deficient number, since it is larger than the sum of its proper divisors (461963).

21412141 is a wasteful number, since it uses less digits than its factorization.

21412141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2351.

The product of its digits is 64, while the sum is 16.

The square root of 21412141 is about 4627.3254694262. The cubic root of 21412141 is about 277.6856037228.

Adding to 21412141 its reverse (14121412), we get a palindrome (35533553).

It can be divided in two parts, 2 and 1412141, that multiplied together give a palindrome (2824282).

The spelling of 21412141 in words is "twenty-one million, four hundred twelve thousand, one hundred forty-one".