2787481 has 2 divisors, whose sum is σ = 2787482. Its totient is φ = 2787480.

The previous prime is 2787479. The next prime is 2787497. The reversal of 2787481 is 1847872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2202256 + 585225 = 1484^2 + 765^2 .

It is a cyclic number.

It is not a de Polignac number, because 2787481 - 2¹ = 2787479 is a prime.

It is a super-2 number, since 2×2787481² = 15540100650722, which contains 22 as substring.

Together with 2787479, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2787481.

It is not a weakly prime, because it can be changed into another prime (2787461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1393740 + 1393741.

It is an arithmetic number, because the mean of its divisors is an integer number (1393741).

2^2787481 is an apocalyptic number.

It is an amenable number.

2787481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2787481 is an equidigital number, since it uses as much as digits as its factorization.

2787481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25088, while the sum is 37.

The square root of 2787481 is about 1669.5750956456. The cubic root of 2787481 is about 140.7356009571.

The spelling of 2787481 in words is "two million, seven hundred eighty-seven thousand, four hundred eighty-one".