2542778 has 16 divisors (see below), whose sum is σ = 4510080. Its totient is φ = 1052016.

The previous prime is 2542759. The next prime is 2542817. The reversal of 2542778 is 8772452.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2726 + ... + 3537.

It is an arithmetic number, because the mean of its divisors is an integer number (281880).

2^2542778 is an apocalyptic number.

2542778 is a deficient number, since it is larger than the sum of its proper divisors (1967302).

2542778 is a wasteful number, since it uses less digits than its factorization.

2542778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6301.

The product of its digits is 31360, while the sum is 35.

The square root of 2542778 is about 1594.6090429946. The cubic root of 2542778 is about 136.4906226926.

The spelling of 2542778 in words is "two million, five hundred forty-two thousand, seven hundred seventy-eight".