12215493 has 12 divisors (see below), whose sum is σ = 17978220. Its totient is φ = 7989696.

The previous prime is 12215477. The next prime is 12215527. The reversal of 12215493 is 39451221.

12215493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11168964 + 1046529 = 3342^2 + 1023^2 .

It is not a de Polignac number, because 12215493 - 2⁴ = 12215477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12215473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12328 + ... + 13281.

It is an arithmetic number, because the mean of its divisors is an integer number (1498185).

Almost surely, 2^12215493 is an apocalyptic number.

It is an amenable number.

12215493 is a deficient number, since it is larger than the sum of its proper divisors (5762727).

12215493 is a wasteful number, since it uses less digits than its factorization.

12215493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25668 (or 25665 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 12215493 is about 3495.0669521484. The cubic root of 12215493 is about 230.3051589000.

It can be divided in two parts, 1221 and 5493, that multiplied together give a triangular number (6706953 = T₃₆₆₂).

The spelling of 12215493 in words is "twelve million, two hundred fifteen thousand, four hundred ninety-three".