2578117 has 2 divisors, whose sum is σ = 2578118. Its totient is φ = 2578116.

The previous prime is 2578111. The next prime is 2578133. The reversal of 2578117 is 7118752.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2556801 + 21316 = 1599^2 + 146^2 .

It is a cyclic number.

It is not a de Polignac number, because 2578117 - 2³ = 2578109 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2578111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1289058 + 1289059.

It is an arithmetic number, because the mean of its divisors is an integer number (1289059).

2^2578117 is an apocalyptic number.

It is an amenable number.

2578117 is a deficient number, since it is larger than the sum of its proper divisors (1).

2578117 is an equidigital number, since it uses as much as digits as its factorization.

2578117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3920, while the sum is 31.

The square root of 2578117 is about 1605.6515811346. The cubic root of 2578117 is about 137.1200219813.

The spelling of 2578117 in words is "two million, five hundred seventy-eight thousand, one hundred seventeen".