12454721 has 4 divisors (see below), whose sum is σ = 12479700. Its totient is φ = 12429744.

The previous prime is 12454711. The next prime is 12454733. The reversal of 12454721 is 12745421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12745421 = 13 ⋅980417.

It can be written as a sum of positive squares in 2 ways, for example, as 5880625 + 6574096 = 2425^2 + 2564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12454721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12454711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11726 + ... + 12743.

It is an arithmetic number, because the mean of its divisors is an integer number (3119925).

Almost surely, 2^12454721 is an apocalyptic number.

It is an amenable number.

12454721 is a deficient number, since it is larger than the sum of its proper divisors (24979).

12454721 is an equidigital number, since it uses as much as digits as its factorization.

12454721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24978.

The product of its digits is 2240, while the sum is 26.

The square root of 12454721 is about 3529.1246790104. The cubic root of 12454721 is about 231.7988806458.

It can be divided in two parts, 124 and 54721, that added together give a palindrome (54845).

The spelling of 12454721 in words is "twelve million, four hundred fifty-four thousand, seven hundred twenty-one".