12578449 has 8 divisors (see below), whose sum is σ = 13589352. Its totient is φ = 11573760.

The previous prime is 12578443. The next prime is 12578471. The reversal of 12578449 is 94487521.

It can be written as a sum of positive squares in 4 ways, for example, as 25600 + 12552849 = 160^2 + 3543^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12578449 - 2³ = 12578441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12578441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3219 + ... + 5959.

It is an arithmetic number, because the mean of its divisors is an integer number (1698669).

It is a vampire number, since it can be written as 2741 ⋅ 4589 (with its own digits).

Almost surely, 2^12578449 is an apocalyptic number.

It is an amenable number.

12578449 is a deficient number, since it is larger than the sum of its proper divisors (1010903).

12578449 is a wasteful number, since it uses less digits than its factorization.

12578449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3107.

The product of its digits is 80640, while the sum is 40.

The square root of 12578449 is about 3546.6109174816. The cubic root of 12578449 is about 232.5639335489.

The spelling of 12578449 in words is "twelve million, five hundred seventy-eight thousand, four hundred forty-nine".