2787261 has 4 divisors (see below), whose sum is σ = 3716352. Its totient is φ = 1858172.

The previous prime is 2787259. The next prime is 2787271. The reversal of 2787261 is 1627872.

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 2787261 - 2¹ = 2787259 is a prime.

It is a D-number.

It is a Curzon number.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464541 + ... + 464546.

It is an arithmetic number, because the mean of its divisors is an integer number (929088).

2^2787261 is an apocalyptic number.

It is an amenable number.

2787261 is a deficient number, since it is larger than the sum of its proper divisors (929091).

2787261 is an equidigital number, since it uses as much as digits as its factorization.

2787261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929090.

The product of its digits is 9408, while the sum is 33.

The square root of 2787261 is about 1669.5092093187. The cubic root of 2787261 is about 140.7318983732.

The spelling of 2787261 in words is "two million, seven hundred eighty-seven thousand, two hundred sixty-one".