12578817 has 8 divisors (see below), whose sum is σ = 17654560. Its totient is φ = 7944480.

The previous prime is 12578807. The next prime is 12578879. The reversal of 12578817 is 71887521.

12578817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12578817 - 2⁴ = 12578801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12578807) 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, 110284 + ... + 110397.

It is an arithmetic number, because the mean of its divisors is an integer number (2206820).

It is a Proth number, since it is equal to 3071 ⋅ 2¹² + 1 and 3071 < 2¹².

Almost surely, 2^12578817 is an apocalyptic number.

It is an amenable number.

12578817 is a deficient number, since it is larger than the sum of its proper divisors (5075743).

12578817 is a wasteful number, since it uses less digits than its factorization.

12578817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220703.

The product of its digits is 31360, while the sum is 39.

The square root of 12578817 is about 3546.6627976169. The cubic root of 12578817 is about 232.5662015204.

The spelling of 12578817 in words is "twelve million, five hundred seventy-eight thousand, eight hundred seventeen".