2578961 has 8 divisors (see below), whose sum is σ = 3215424. Its totient is φ = 2009520.

The previous prime is 2578943. The next prime is 2578963. The reversal of 2578961 is 1698752.

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 2578961 - 2¹⁸ = 2316817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2578963) 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, 16670 + ... + 16823.

It is an arithmetic number, because the mean of its divisors is an integer number (401928).

2^2578961 is an apocalyptic number.

It is an amenable number.

2578961 is a deficient number, since it is larger than the sum of its proper divisors (636463).

2578961 is a wasteful number, since it uses less digits than its factorization.

2578961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33511.

The product of its digits is 30240, while the sum is 38.

The square root of 2578961 is about 1605.9143812794. The cubic root of 2578961 is about 137.1349833753.

It can be divided in two parts, 25 and 78961, that multiplied together give a square (1974025 = 1405²).

The spelling of 2578961 in words is "two million, five hundred seventy-eight thousand, nine hundred sixty-one".