12541021 has 4 divisors (see below), whose sum is σ = 12973500. Its totient is φ = 12108544.

The previous prime is 12540989. The next prime is 12541027. The reversal of 12541021 is 12014521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3956121 + 8584900 = 1989^2 + 2930^2 .

It is not a de Polignac number, because 12541021 - 2⁵ = 12540989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12540986 and 12541004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12541027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216196 + ... + 216253.

It is an arithmetic number, because the mean of its divisors is an integer number (3243375).

Almost surely, 2^12541021 is an apocalyptic number.

It is an amenable number.

12541021 is a deficient number, since it is larger than the sum of its proper divisors (432479).

12541021 is an equidigital number, since it uses as much as digits as its factorization.

12541021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432478.

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

The square root of 12541021 is about 3541.3303997227. The cubic root of 12541021 is about 232.3330346330. Note that the first 3 decimals are identical.

Adding to 12541021 its reverse (12014521), we get a palindrome (24555542).

The spelling of 12541021 in words is "twelve million, five hundred forty-one thousand, twenty-one".