2578317 has 8 divisors (see below), whose sum is σ = 3928896. Its totient is φ = 1473312.

The previous prime is 2578297. The next prime is 2578343. The reversal of 2578317 is 7138752.

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

It is not a de Polignac number, because 2578317 - 2⁶ = 2578253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578117) 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 7 ways as a sum of consecutive naturals, for example, 61368 + ... + 61409.

It is an arithmetic number, because the mean of its divisors is an integer number (491112).

2^2578317 is an apocalyptic number.

It is an amenable number.

2578317 is a deficient number, since it is larger than the sum of its proper divisors (1350579).

2578317 is a wasteful number, since it uses less digits than its factorization.

2578317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122787.

The product of its digits is 11760, while the sum is 33.

The square root of 2578317 is about 1605.7138599389. The cubic root of 2578317 is about 137.1235676305.

The spelling of 2578317 in words is "two million, five hundred seventy-eight thousand, three hundred seventeen".