21560041 has 8 divisors (see below), whose sum is σ = 22738400. Its totient is φ = 20386080.

The previous prime is 21560027. The next prime is 21560047. The reversal of 21560041 is 14006512.

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 21560041 - 2⁵ = 21560009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21560047) 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, 15661 + ... + 16981.

It is an arithmetic number, because the mean of its divisors is an integer number (2842300).

Almost surely, 2^21560041 is an apocalyptic number.

It is an amenable number.

21560041 is a deficient number, since it is larger than the sum of its proper divisors (1178359).

21560041 is a wasteful number, since it uses less digits than its factorization.

21560041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2199.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 21560041 is about 4643.2791214830. The cubic root of 21560041 is about 278.3234895184.

Adding to 21560041 its reverse (14006512), we get a palindrome (35566553).

The spelling of 21560041 in words is "twenty-one million, five hundred sixty thousand, forty-one".