12503401 has 4 divisors (see below), whose sum is σ = 12808404. Its totient is φ = 12198400.

The previous prime is 12503371. The next prime is 12503417. The reversal of 12503401 is 10430521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10430521 = 1039 ⋅10039.

It can be written as a sum of positive squares in 2 ways, for example, as 5475600 + 7027801 = 2340^2 + 2651^2 .

It is a cyclic number.

It is not a de Polignac number, because 12503401 - 2¹¹ = 12501353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12503441) 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, 152440 + ... + 152521.

It is an arithmetic number, because the mean of its divisors is an integer number (3202101).

Almost surely, 2^12503401 is an apocalyptic number.

It is an amenable number.

12503401 is a deficient number, since it is larger than the sum of its proper divisors (305003).

12503401 is an equidigital number, since it uses as much as digits as its factorization.

12503401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305002.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 12503401 is about 3536.0148472539. The cubic root of 12503401 is about 232.1004878302.

Adding to 12503401 its reverse (10430521), we get a palindrome (22933922).

The spelling of 12503401 in words is "twelve million, five hundred three thousand, four hundred one".