12351257 has 4 divisors (see below), whose sum is σ = 12358500. Its totient is φ = 12344016.

The previous prime is 12351247. The next prime is 12351263. The reversal of 12351257 is 75215321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 75215321 = 53 ⋅1419157.

It can be written as a sum of positive squares in 2 ways, for example, as 7958041 + 4393216 = 2821^2 + 2096^2 .

It is a cyclic number.

It is not a de Polignac number, because 12351257 - 2⁶ = 12351193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12351217) 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, 503 + ... + 4995.

It is an arithmetic number, because the mean of its divisors is an integer number (3089625).

Almost surely, 2^12351257 is an apocalyptic number.

It is an amenable number.

12351257 is a deficient number, since it is larger than the sum of its proper divisors (7243).

12351257 is an equidigital number, since it uses as much as digits as its factorization.

12351257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7242.

The product of its digits is 2100, while the sum is 26.

The square root of 12351257 is about 3514.4355165517. The cubic root of 12351257 is about 231.1552275882.

Adding to 12351257 its reverse (75215321), we get a palindrome (87566578).

The spelling of 12351257 in words is "twelve million, three hundred fifty-one thousand, two hundred fifty-seven".