2578215 has 8 divisors (see below), whose sum is σ = 4125168. Its totient is φ = 1375040.

The previous prime is 2578207. The next prime is 2578217. The reversal of 2578215 is 5128752.

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

It is not a de Polignac number, because 2578215 - 2³ = 2578207 is a prime.

It is an Ulam number.

2578215 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578217) 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, 85926 + ... + 85955.

It is an arithmetic number, because the mean of its divisors is an integer number (515646).

2^2578215 is an apocalyptic number.

2578215 is a deficient number, since it is larger than the sum of its proper divisors (1546953).

2578215 is a wasteful number, since it uses less digits than its factorization.

2578215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171889.

The product of its digits is 5600, while the sum is 30.

The square root of 2578215 is about 1605.6820980505. The cubic root of 2578215 is about 137.1217593723.

The spelling of 2578215 in words is "two million, five hundred seventy-eight thousand, two hundred fifteen".