2585978 has 4 divisors (see below), whose sum is σ = 3878970. Its totient is φ = 1292988.

The previous prime is 2585971. The next prime is 2585981. The reversal of 2585978 is 8795852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2505889 + 80089 = 1583^2 + 283^2 .

It is not an unprimeable number, because it can be changed into a prime (2585971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 646493 + ... + 646496.

2^2585978 is an apocalyptic number.

2585978 is a deficient number, since it is larger than the sum of its proper divisors (1292992).

2585978 is a wasteful number, since it uses less digits than its factorization.

2585978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292991.

The product of its digits is 201600, while the sum is 44.

The square root of 2585978 is about 1608.0976338519. The cubic root of 2585978 is about 137.2592459180.

The spelling of 2585978 in words is "two million, five hundred eighty-five thousand, nine hundred seventy-eight".