2578945 has 8 divisors (see below), whose sum is σ = 3104640. Its totient is φ = 2056560.

The previous prime is 2578943. The next prime is 2578963. The reversal of 2578945 is 5498752.

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

It is not a de Polignac number, because 2578945 - 2¹ = 2578943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2578898 and 2578907.

It is not an unprimeable number, because it can be changed into a prime (2578943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1480 + ... + 2710.

It is an arithmetic number, because the mean of its divisors is an integer number (388080).

2^2578945 is an apocalyptic number.

It is an amenable number.

2578945 is a deficient number, since it is larger than the sum of its proper divisors (525695).

2578945 is a wasteful number, since it uses less digits than its factorization.

2578945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655.

The product of its digits is 100800, while the sum is 40.

The square root of 2578945 is about 1605.9093996860. The cubic root of 2578945 is about 137.1346997773.

The spelling of 2578945 in words is "two million, five hundred seventy-eight thousand, nine hundred forty-five".