2547878 has 4 divisors (see below), whose sum is σ = 3821820. Its totient is φ = 1273938.

The previous prime is 2547847. The next prime is 2547887. The reversal of 2547878 is 8787452.

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636968 + ... + 636971.

It is an arithmetic number, because the mean of its divisors is an integer number (955455).

2^2547878 is an apocalyptic number.

2547878 is a deficient number, since it is larger than the sum of its proper divisors (1273942).

2547878 is a wasteful number, since it uses less digits than its factorization.

2547878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273941.

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

The square root of 2547878 is about 1596.2073800105. The cubic root of 2547878 is about 136.5818139419.

The spelling of 2547878 in words is "two million, five hundred forty-seven thousand, eight hundred seventy-eight".