12503311 has 4 divisors (see below), whose sum is σ = 13161400. Its totient is φ = 11845224.

The previous prime is 12503297. The next prime is 12503317. The reversal of 12503311 is 11330521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11330521 = 179 ⋅63299.

It is a cyclic number.

It is not a de Polignac number, because 12503311 - 2¹⁵ = 12470543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12503317) 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, 329016 + ... + 329053.

It is an arithmetic number, because the mean of its divisors is an integer number (3290350).

Almost surely, 2^12503311 is an apocalyptic number.

12503311 is a deficient number, since it is larger than the sum of its proper divisors (658089).

12503311 is an equidigital number, since it uses as much as digits as its factorization.

12503311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658088.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 12503311 is about 3536.0021210401. The cubic root of 12503311 is about 232.0999309392.

Adding to 12503311 its reverse (11330521), we get a palindrome (23833832).

The spelling of 12503311 in words is "twelve million, five hundred three thousand, three hundred eleven".