21260441 has 8 divisors (see below), whose sum is σ = 22311744. Its totient is φ = 20219760.

The previous prime is 21260431. The next prime is 21260443. The reversal of 21260441 is 14406212.

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

It is not a de Polignac number, because 21260441 - 2⁶ = 21260377 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (21260443) 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, 1610 + ... + 6716.

It is an arithmetic number, because the mean of its divisors is an integer number (2788968).

Almost surely, 2^21260441 is an apocalyptic number.

It is an amenable number.

21260441 is a deficient number, since it is larger than the sum of its proper divisors (1051303).

21260441 is a wasteful number, since it uses less digits than its factorization.

21260441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5311.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 21260441 is about 4610.9045750265. The cubic root of 21260441 is about 277.0282697800.

Adding to 21260441 its reverse (14406212), we get a palindrome (35666653).

The spelling of 21260441 in words is "twenty-one million, two hundred sixty thousand, four hundred forty-one".