12563257 has 6 divisors (see below), whose sum is σ = 14614458. Its totient is φ = 10768464.

The previous prime is 12563249. The next prime is 12563263. The reversal of 12563257 is 75236521.

It can be written as a sum of positive squares in only one way, i.e., 11431161 + 1132096 = 3381^2 + 1064^2 .

It is not a de Polignac number, because 12563257 - 2³ = 12563249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12563207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128148 + ... + 128245.

It is an arithmetic number, because the mean of its divisors is an integer number (2435743).

Almost surely, 2^12563257 is an apocalyptic number.

It is an amenable number.

12563257 is a deficient number, since it is larger than the sum of its proper divisors (2051201).

12563257 is an equidigital number, since it uses as much as digits as its factorization.

12563257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256407 (or 256400 counting only the distinct ones).

The product of its digits is 12600, while the sum is 31.

The square root of 12563257 is about 3544.4685074070. The cubic root of 12563257 is about 232.4702671347.

Adding to 12563257 its reverse (75236521), we get a palindrome (87799778).

The spelling of 12563257 in words is "twelve million, five hundred sixty-three thousand, two hundred fifty-seven".