12402563 has 4 divisors (see below), whose sum is σ = 12451080. Its totient is φ = 12354048.

The previous prime is 12402547. The next prime is 12402569. The reversal of 12402563 is 36520421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36520421 = 7 ⋅5217203.

It is a cyclic number.

It is not a de Polignac number, because 12402563 - 2⁴ = 12402547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12402569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23873 + ... + 24386.

It is an arithmetic number, because the mean of its divisors is an integer number (3112770).

Almost surely, 2^12402563 is an apocalyptic number.

12402563 is a deficient number, since it is larger than the sum of its proper divisors (48517).

12402563 is an equidigital number, since it uses as much as digits as its factorization.

12402563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48516.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 12402563 is about 3521.7272750740. The cubic root of 12402563 is about 231.4748513748.

Adding to 12402563 its reverse (36520421), we get a palindrome (48922984).

The spelling of 12402563 in words is "twelve million, four hundred two thousand, five hundred sixty-three".