12315493 has 2 divisors, whose sum is σ = 12315494. Its totient is φ = 12315492.

The previous prime is 12315481. The next prime is 12315509. The reversal of 12315493 is 39451321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6853924 + 5461569 = 2618^2 + 2337^2 .

It is a cyclic number.

It is not a de Polignac number, because 12315493 - 2⁵ = 12315461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12315403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6157746 + 6157747.

It is an arithmetic number, because the mean of its divisors is an integer number (6157747).

Almost surely, 2^12315493 is an apocalyptic number.

It is an amenable number.

12315493 is a deficient number, since it is larger than the sum of its proper divisors (1).

12315493 is an equidigital number, since it uses as much as digits as its factorization.

12315493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 28.

The square root of 12315493 is about 3509.3436708308. The cubic root of 12315493 is about 230.9319027424.

It can be divided in two parts, 1231 and 5493, that added together give a square (6724 = 82²).

The spelling of 12315493 in words is "twelve million, three hundred fifteen thousand, four hundred ninety-three".