2578006 has 4 divisors (see below), whose sum is σ = 3867012. Its totient is φ = 1289002.

The previous prime is 2578003. The next prime is 2578019. The reversal of 2578006 is 6008752.

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

It is a super-2 number, since 2×2578006² = 13292229872072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644500 + ... + 644503.

It is an arithmetic number, because the mean of its divisors is an integer number (966753).

2^2578006 is an apocalyptic number.

2578006 is a deficient number, since it is larger than the sum of its proper divisors (1289006).

2578006 is a wasteful number, since it uses less digits than its factorization.

2578006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289005.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 2578006 is about 1605.6170153558. The cubic root of 2578006 is about 137.1180540669.

The spelling of 2578006 in words is "two million, five hundred seventy-eight thousand, six".