2578145 has 8 divisors (see below), whose sum is σ = 3108456. Its totient is φ = 2052736.

The previous prime is 2578133. The next prime is 2578153. The reversal of 2578145 is 5418752.

It can be written as a sum of positive squares in 4 ways, for example, as 620944 + 1957201 = 788^2 + 1399^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2578145 - 2⁸ = 2577889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59 + ... + 2271.

It is an arithmetic number, because the mean of its divisors is an integer number (388557).

2^2578145 is an apocalyptic number.

It is an amenable number.

2578145 is a deficient number, since it is larger than the sum of its proper divisors (530311).

2578145 is a wasteful number, since it uses less digits than its factorization.

2578145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451.

The product of its digits is 11200, while the sum is 32.

The square root of 2578145 is about 1605.6603003126. The cubic root of 2578145 is about 137.1205183833.

The spelling of 2578145 in words is "two million, five hundred seventy-eight thousand, one hundred forty-five".