21141005 has 8 divisors (see below), whose sum is σ = 25395552. Its totient is φ = 16895248.

The previous prime is 21140957. The next prime is 21141007. The reversal of 21141005 is 50014112.

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 21141005 - 2¹⁰ = 21139981 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 (21141007) 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, 5654 + ... + 8616.

It is an arithmetic number, because the mean of its divisors is an integer number (3174444).

Almost surely, 2^21141005 is an apocalyptic number.

It is an amenable number.

21141005 is a deficient number, since it is larger than the sum of its proper divisors (4254547).

21141005 is a wasteful number, since it uses less digits than its factorization.

21141005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4395.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 21141005 is about 4597.9348625225. The cubic root of 21141005 is about 276.5085361105.

Adding to 21141005 its reverse (50014112), we get a palindrome (71155117).

The spelling of 21141005 in words is "twenty-one million, one hundred forty-one thousand, five".