12403257 has 16 divisors (see below), whose sum is σ = 17525760. Its totient is φ = 7780752.

The previous prime is 12403249. The next prime is 12403267. The reversal of 12403257 is 75230421.

12403257 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12403257 - 2³ = 12403249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12403267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8868 + ... + 10170.

It is an arithmetic number, because the mean of its divisors is an integer number (1095360).

Almost surely, 2^12403257 is an apocalyptic number.

It is an amenable number.

12403257 is a deficient number, since it is larger than the sum of its proper divisors (5122503).

12403257 is a wasteful number, since it uses less digits than its factorization.

12403257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 12403257 is about 3521.8258048915. The cubic root of 12403257 is about 231.4791687768.

Adding to 12403257 its reverse (75230421), we get a palindrome (87633678).

The spelling of 12403257 in words is "twelve million, four hundred three thousand, two hundred fifty-seven".