2778142 has 16 divisors (see below), whose sum is σ = 4539600. Its totient is φ = 1270080.

The previous prime is 2778131. The next prime is 2778143. The reversal of 2778142 is 2418772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159 + ... + 2362.

It is an arithmetic number, because the mean of its divisors is an integer number (283725).

2^2778142 is an apocalyptic number.

2778142 is a deficient number, since it is larger than the sum of its proper divisors (1761458).

2778142 is a wasteful number, since it uses less digits than its factorization.

2778142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2571.

The product of its digits is 6272, while the sum is 31.

The square root of 2778142 is about 1666.7759297518. The cubic root of 2778142 is about 140.5782545535.

The spelling of 2778142 in words is "two million, seven hundred seventy-eight thousand, one hundred forty-two".