2587478 has 4 divisors (see below), whose sum is σ = 3881220. Its totient is φ = 1293738.

The previous prime is 2587441. The next prime is 2587499. The reversal of 2587478 is 8747852.

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

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 646868 + ... + 646871.

It is an arithmetic number, because the mean of its divisors is an integer number (970305).

2^2587478 is an apocalyptic number.

2587478 is a deficient number, since it is larger than the sum of its proper divisors (1293742).

2587478 is a wasteful number, since it uses less digits than its factorization.

2587478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293741.

The product of its digits is 125440, while the sum is 41.

The square root of 2587478 is about 1608.5639558314. The cubic root of 2587478 is about 137.2857799247.

It can be divided in two parts, 25874 and 78, that added together give a palindrome (25952).

The spelling of 2587478 in words is "two million, five hundred eighty-seven thousand, four hundred seventy-eight".