2781875 has 10 divisors (see below), whose sum is σ = 3477012. Its totient is φ = 2225000.

The previous prime is 2781853. The next prime is 2781887. The reversal of 2781875 is 5781872.

It is not a de Polignac number, because 2781875 - 2¹⁸ = 2519731 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1601 + ... + 2850.

2^2781875 is an apocalyptic number.

2781875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2781875 is a deficient number, since it is larger than the sum of its proper divisors (695137).

2781875 is an frugal number, since it uses more digits than its factorization.

2781875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4471 (or 4456 counting only the distinct ones).

The product of its digits is 31360, while the sum is 38.

The square root of 2781875 is about 1667.8953804121. The cubic root of 2781875 is about 140.6411915513.

The spelling of 2781875 in words is "two million, seven hundred eighty-one thousand, eight hundred seventy-five".