2878142 has 4 divisors (see below), whose sum is σ = 4317216. Its totient is φ = 1439070.

The previous prime is 2878123. The next prime is 2878147. The reversal of 2878142 is 2418782.

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

It is a junction number, because it is equal to n+sod(n) for n = 2878099 and 2878108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2878147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719534 + ... + 719537.

It is an arithmetic number, because the mean of its divisors is an integer number (1079304).

2^2878142 is an apocalyptic number.

2878142 is a deficient number, since it is larger than the sum of its proper divisors (1439074).

2878142 is a wasteful number, since it uses less digits than its factorization.

2878142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439073.

The product of its digits is 7168, while the sum is 32.

The square root of 2878142 is about 1696.5087680292. The cubic root of 2878142 is about 142.2451297285.

The spelling of 2878142 in words is "two million, eight hundred seventy-eight thousand, one hundred forty-two".