12531457 has 4 divisors (see below), whose sum is σ = 12538800. Its totient is φ = 12524116.

The previous prime is 12531443. The next prime is 12531461. The reversal of 12531457 is 75413521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 75413521 = 47 ⋅1604543.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12531457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12531437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378 + ... + 5020.

It is an arithmetic number, because the mean of its divisors is an integer number (3134700).

Almost surely, 2^12531457 is an apocalyptic number.

It is an amenable number.

12531457 is a deficient number, since it is larger than the sum of its proper divisors (7343).

12531457 is an equidigital number, since it uses as much as digits as its factorization.

12531457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7342.

The product of its digits is 4200, while the sum is 28.

The square root of 12531457 is about 3539.9798022023. The cubic root of 12531457 is about 232.2739592133.

Adding to 12531457 its reverse (75413521), we get a palindrome (87944978).

The spelling of 12531457 in words is "twelve million, five hundred thirty-one thousand, four hundred fifty-seven".