21412641 has 8 divisors (see below), whose sum is σ = 28742400. Its totient is φ = 14178992.

The previous prime is 21412631. The next prime is 21412649. The reversal of 21412641 is 14621412.

It is a happy number.

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 21412641 - 2⁶ = 21412577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21412649) 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, 23505 + ... + 24398.

It is an arithmetic number, because the mean of its divisors is an integer number (3592800).

Almost surely, 2^21412641 is an apocalyptic number.

It is an amenable number.

21412641 is a deficient number, since it is larger than the sum of its proper divisors (7329759).

21412641 is a wasteful number, since it uses less digits than its factorization.

21412641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48055.

The product of its digits is 384, while the sum is 21.

The square root of 21412641 is about 4627.3794959999. The cubic root of 21412641 is about 277.6877651401.

It can be divided in two parts, 2 and 1412641, that multiplied together give a palindrome (2825282).

The spelling of 21412641 in words is "twenty-one million, four hundred twelve thousand, six hundred forty-one".