12878577 has 6 divisors (see below), whose sum is σ = 18602402. Its totient is φ = 8585712.

The previous prime is 12878563. The next prime is 12878603. The reversal of 12878577 is 77587821.

12878577 is a `hidden beast` number, since 1 + 2 + 8 + 78 + 577 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10556001 + 2322576 = 3249^2 + 1524^2 .

It is not a de Polignac number, because 12878577 - 2¹² = 12874481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12878377) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 715468 + ... + 715485.

Almost surely, 2^12878577 is an apocalyptic number.

It is an amenable number.

12878577 is a deficient number, since it is larger than the sum of its proper divisors (5723825).

12878577 is a wasteful number, since it uses less digits than its factorization.

12878577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430959 (or 1430956 counting only the distinct ones).

The product of its digits is 219520, while the sum is 45.

The square root of 12878577 is about 3588.6734317851. The cubic root of 12878577 is about 234.3991106929.

The spelling of 12878577 in words is "twelve million, eight hundred seventy-eight thousand, five hundred seventy-seven".