2787201 has 12 divisors (see below), whose sum is σ = 4263012. Its totient is φ = 1748736.

The previous prime is 2787181. The next prime is 2787227. The reversal of 2787201 is 1027872.

It can be written as a sum of positive squares in 2 ways, for example, as 1404225 + 1382976 = 1185^2 + 1176^2 .

It is not a de Polignac number, because 2787201 - 2⁷ = 2787073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2787251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8956 + ... + 9261.

It is an arithmetic number, because the mean of its divisors is an integer number (355251).

2^2787201 is an apocalyptic number.

It is an amenable number.

2787201 is a deficient number, since it is larger than the sum of its proper divisors (1475811).

2787201 is a wasteful number, since it uses less digits than its factorization.

2787201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18240 (or 18237 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 2787201 is about 1669.4912398692. The cubic root of 2787201 is about 140.7308885438.

The spelling of 2787201 in words is "two million, seven hundred eighty-seven thousand, two hundred one".