21325041 has 6 divisors (see below), whose sum is σ = 30802850. Its totient is φ = 14216688.

The previous prime is 21325037. The next prime is 21325093. The reversal of 21325041 is 14052312.

It can be written as a sum of positive squares in only one way, i.e., 20793600 + 531441 = 4560^2 + 729^2 .

It is not a de Polignac number, because 21325041 - 2² = 21325037 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21325441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1184716 + ... + 1184733.

Almost surely, 2^21325041 is an apocalyptic number.

It is an amenable number.

21325041 is a deficient number, since it is larger than the sum of its proper divisors (9477809).

21325041 is a wasteful number, since it uses less digits than its factorization.

21325041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2369455 (or 2369452 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 21325041 is about 4617.9043948527. The cubic root of 21325041 is about 277.3085701907.

Adding to 21325041 its reverse (14052312), we get a palindrome (35377353).

The spelling of 21325041 in words is "twenty-one million, three hundred twenty-five thousand, forty-one".