21125041 has 8 divisors (see below), whose sum is σ = 24171840. Its totient is φ = 18085488.

The previous prime is 21125029. The next prime is 21125057. The reversal of 21125041 is 14052112.

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 21125041 - 2⁹ = 21124529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21120041) 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, 7995 + ... + 10303.

It is an arithmetic number, because the mean of its divisors is an integer number (3021480).

Almost surely, 2^21125041 is an apocalyptic number.

It is an amenable number.

21125041 is a deficient number, since it is larger than the sum of its proper divisors (3046799).

21125041 is a wasteful number, since it uses less digits than its factorization.

21125041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3623.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 21125041 is about 4596.1985379224. The cubic root of 21125041 is about 276.4389195239.

Adding to 21125041 its reverse (14052112), we get a palindrome (35177153).

It can be divided in two parts, 211 and 25041, that added together give a palindrome (25252).

The spelling of 21125041 in words is "twenty-one million, one hundred twenty-five thousand, forty-one".