12520451 has 2 divisors, whose sum is σ = 12520452. Its totient is φ = 12520450.

The previous prime is 12520447. The next prime is 12520463. The reversal of 12520451 is 15402521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12520451 - 2² = 12520447 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12520421) 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 as a sum of consecutive naturals, namely, 6260225 + 6260226.

It is an arithmetic number, because the mean of its divisors is an integer number (6260226).

Almost surely, 2^12520451 is an apocalyptic number.

12520451 is a deficient number, since it is larger than the sum of its proper divisors (1).

12520451 is an equidigital number, since it uses as much as digits as its factorization.

12520451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 12520451 is about 3538.4249320849. The cubic root of 12520451 is about 232.2059395631.

Adding to 12520451 its reverse (15402521), we get a palindrome (27922972).

The spelling of 12520451 in words is "twelve million, five hundred twenty thousand, four hundred fifty-one".