12521473 has 2 divisors, whose sum is σ = 12521474. Its totient is φ = 12521472.

The previous prime is 12521447. The next prime is 12521479. The reversal of 12521473 is 37412521.

It is a happy number.

12521473 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7354944 + 5166529 = 2712^2 + 2273^2 .

It is a cyclic number.

It is not a de Polignac number, because 12521473 - 2¹⁷ = 12390401 is a prime.

It is not a weakly prime, because it can be changed into another prime (12521479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6260736 + 6260737.

It is an arithmetic number, because the mean of its divisors is an integer number (6260737).

It is a Proth number, since it is equal to 3057 ⋅ 2¹² + 1 and 3057 < 2¹².

Almost surely, 2^12521473 is an apocalyptic number.

It is an amenable number.

12521473 is a deficient number, since it is larger than the sum of its proper divisors (1).

12521473 is an equidigital number, since it uses as much as digits as its factorization.

12521473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 25.

The square root of 12521473 is about 3538.5693436755. The cubic root of 12521473 is about 232.2122574403.

Adding to 12521473 its reverse (37412521), we get a palindrome (49933994).

The spelling of 12521473 in words is "twelve million, five hundred twenty-one thousand, four hundred seventy-three".