2878261 has 4 divisors (see below), whose sum is σ = 2891392. Its totient is φ = 2865132.

The previous prime is 2878247. The next prime is 2878297. The reversal of 2878261 is 1628782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2878261 - 2⁵ = 2878229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2878231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6231 + ... + 6676.

It is an arithmetic number, because the mean of its divisors is an integer number (722848).

2^2878261 is an apocalyptic number.

2878261 is the 980-th hex number.

It is an amenable number.

2878261 is a deficient number, since it is larger than the sum of its proper divisors (13131).

2878261 is a wasteful number, since it uses less digits than its factorization.

2878261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13130.

The product of its digits is 10752, while the sum is 34.

The square root of 2878261 is about 1696.5438396929. The cubic root of 2878261 is about 142.2470901294.

The spelling of 2878261 in words is "two million, eight hundred seventy-eight thousand, two hundred sixty-one".