12942449 has 4 divisors (see below), whose sum is σ = 13938036. Its totient is φ = 11946864.

The previous prime is 12942427. The next prime is 12942467. The reversal of 12942449 is 94424921.

12942449 = 693² + 694² + ... + 718².

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: 94424921 = 137 ⋅689233.

It can be written as a sum of positive squares in 2 ways, for example, as 552049 + 12390400 = 743^2 + 3520^2 .

It is a cyclic number.

It is not a de Polignac number, because 12942449 - 2²⁰ = 11893873 is a prime.

It is a super-2 number, since 2×12942449² = 335013972235202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12942409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497774 + ... + 497799.

It is an arithmetic number, because the mean of its divisors is an integer number (3484509).

Almost surely, 2^12942449 is an apocalyptic number.

It is an amenable number.

12942449 is a deficient number, since it is larger than the sum of its proper divisors (995587).

12942449 is an equidigital number, since it uses as much as digits as its factorization.

12942449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995586.

The product of its digits is 20736, while the sum is 35.

The square root of 12942449 is about 3597.5615352625. The cubic root of 12942449 is about 234.7859768622.

The spelling of 12942449 in words is "twelve million, nine hundred forty-two thousand, four hundred forty-nine".