12402547 has 2 divisors, whose sum is σ = 12402548. Its totient is φ = 12402546.

The previous prime is 12402527. The next prime is 12402569. The reversal of 12402547 is 74520421.

It is a weak prime.

It is an emirp because it is prime and its reverse (74520421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12402547 - 2¹⁹ = 11878259 is a prime.

It is equal to p₈₁₂₇₅₂ and since 12402547 and 812752 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (12402527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6201273 + 6201274.

It is an arithmetic number, because the mean of its divisors is an integer number (6201274).

Almost surely, 2^12402547 is an apocalyptic number.

12402547 is a deficient number, since it is larger than the sum of its proper divisors (1).

12402547 is an equidigital number, since it uses as much as digits as its factorization.

12402547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 12402547 is about 3521.7250034607. The cubic root of 12402547 is about 231.4747518363.

Adding to 12402547 its reverse (74520421), we get a palindrome (86922968).

The spelling of 12402547 in words is "twelve million, four hundred two thousand, five hundred forty-seven".