12315251 has 4 divisors (see below), whose sum is σ = 13262592. Its totient is φ = 11367912.

The previous prime is 12315241. The next prime is 12315253. The reversal of 12315251 is 15251321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12315251 - 2⁶ = 12315187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12315253) 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, 473651 + ... + 473676.

It is an arithmetic number, because the mean of its divisors is an integer number (3315648).

Almost surely, 2^12315251 is an apocalyptic number.

12315251 is a deficient number, since it is larger than the sum of its proper divisors (947341).

12315251 is an equidigital number, since it uses as much as digits as its factorization.

12315251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947340.

The product of its digits is 300, while the sum is 20.

The square root of 12315251 is about 3509.3091912797. The cubic root of 12315251 is about 230.9303901250.

Adding to 12315251 its reverse (15251321), we get a palindrome (27566572).

The spelling of 12315251 in words is "twelve million, three hundred fifteen thousand, two hundred fifty-one".