21560141 has 2 divisors, whose sum is σ = 21560142. Its totient is φ = 21560140.

The previous prime is 21560129. The next prime is 21560153. The reversal of 21560141 is 14106512.

It is a balanced prime because it is at equal distance from previous prime (21560129) and next prime (21560153).

It can be written as a sum of positive squares in only one way, i.e., 20967241 + 592900 = 4579^2 + 770^2 .

It is a cyclic number.

It is not a de Polignac number, because 21560141 - 2¹⁰ = 21559117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21560171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10780070 + 10780071.

It is an arithmetic number, because the mean of its divisors is an integer number (10780071).

Almost surely, 2^21560141 is an apocalyptic number.

It is an amenable number.

21560141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21560141 is an equidigital number, since it uses as much as digits as its factorization.

21560141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 21560141 is about 4643.2898897226. The cubic root of 21560141 is about 278.3239198254.

Adding to 21560141 its reverse (14106512), we get a palindrome (35666653).

The spelling of 21560141 in words is "twenty-one million, five hundred sixty thousand, one hundred forty-one".