21529041 has 8 divisors (see below), whose sum is σ = 29192160. Its totient is φ = 14109312.

The previous prime is 21529019. The next prime is 21529051. The reversal of 21529041 is 14092512.

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

It is not a de Polignac number, because 21529041 - 2⁵ = 21529009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21529051) 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, 60640 + ... + 60993.

It is an arithmetic number, because the mean of its divisors is an integer number (3649020).

Almost surely, 2^21529041 is an apocalyptic number.

It is an amenable number.

21529041 is a deficient number, since it is larger than the sum of its proper divisors (7663119).

21529041 is a wasteful number, since it uses less digits than its factorization.

21529041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121695.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 21529041 is about 4639.9397625400. The cubic root of 21529041 is about 278.1900301752.

Subtracting from 21529041 its reverse (14092512), we obtain a square (7436529 = 2727²).

The spelling of 21529041 in words is "twenty-one million, five hundred twenty-nine thousand, forty-one".