21411541 has 8 divisors (see below), whose sum is σ = 22464000. Its totient is φ = 20380080.

The previous prime is 21411529. The next prime is 21411547. The reversal of 21411541 is 14511412.

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 21411541 - 2¹⁹ = 20887253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411547) 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, 3141 + ... + 7258.

It is an arithmetic number, because the mean of its divisors is an integer number (2808000).

Almost surely, 2^21411541 is an apocalyptic number.

It is an amenable number.

21411541 is a deficient number, since it is larger than the sum of its proper divisors (1052459).

21411541 is a wasteful number, since it uses less digits than its factorization.

21411541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10499.

The product of its digits is 160, while the sum is 19.

The square root of 21411541 is about 4627.2606367050. The cubic root of 21411541 is about 277.6830099775.

Adding to 21411541 its reverse (14511412), we get a palindrome (35922953).

It can be divided in two parts, 21411 and 541, that added together give a cube (21952 = 28³).

The spelling of 21411541 in words is "twenty-one million, four hundred eleven thousand, five hundred forty-one".