12426215 has 4 divisors (see below), whose sum is σ = 14911464. Its totient is φ = 9940968.

The previous prime is 12426173. The next prime is 12426223. The reversal of 12426215 is 51262421.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51262421 = 7 ⋅7323203.

It is a cyclic number.

It is not a de Polignac number, because 12426215 - 2⁶ = 12426151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1242617 + ... + 1242626.

It is an arithmetic number, because the mean of its divisors is an integer number (3727866).

Almost surely, 2^12426215 is an apocalyptic number.

12426215 is a deficient number, since it is larger than the sum of its proper divisors (2485249).

12426215 is an equidigital number, since it uses as much as digits as its factorization.

12426215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2485248.

The product of its digits is 960, while the sum is 23.

The square root of 12426215 is about 3525.0836869499. The cubic root of 12426215 is about 231.6219007292.

Adding to 12426215 its reverse (51262421), we get a palindrome (63688636).

The spelling of 12426215 in words is "twelve million, four hundred twenty-six thousand, two hundred fifteen".