12535403 has 4 divisors (see below), whose sum is σ = 12826968. Its totient is φ = 12243840.

The previous prime is 12535399. The next prime is 12535423. The reversal of 12535403 is 30453521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30453521 = 7 ⋅4350503.

It is a cyclic number.

It is not a de Polignac number, because 12535403 - 2² = 12535399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12535423) 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, 145718 + ... + 145803.

It is an arithmetic number, because the mean of its divisors is an integer number (3206742).

Almost surely, 2^12535403 is an apocalyptic number.

12535403 is a deficient number, since it is larger than the sum of its proper divisors (291565).

12535403 is an equidigital number, since it uses as much as digits as its factorization.

12535403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291564.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 12535403 is about 3540.5371061465. The cubic root of 12535403 is about 232.2983367154.

Adding to 12535403 its reverse (30453521), we get a palindrome (42988924).

The spelling of 12535403 in words is "twelve million, five hundred thirty-five thousand, four hundred three".