21412341 has 6 divisors (see below), whose sum is σ = 30928950. Its totient is φ = 14274888.

The previous prime is 21412337. The next prime is 21412357. The reversal of 21412341 is 14321412.

It can be written as a sum of positive squares in only one way, i.e., 17189316 + 4223025 = 4146^2 + 2055^2 .

It is not a de Polignac number, because 21412341 - 2² = 21412337 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 (21412301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1189566 + ... + 1189583.

It is an arithmetic number, because the mean of its divisors is an integer number (5154825).

Almost surely, 2^21412341 is an apocalyptic number.

It is an amenable number.

21412341 is a deficient number, since it is larger than the sum of its proper divisors (9516609).

21412341 is a wasteful number, since it uses less digits than its factorization.

21412341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2379155 (or 2379152 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 21412341 is about 4627.3470801313. The cubic root of 21412341 is about 277.6864682938.

Adding to 21412341 its reverse (14321412), we get a palindrome (35733753).

The spelling of 21412341 in words is "twenty-one million, four hundred twelve thousand, three hundred forty-one".