2742781 has 2 divisors, whose sum is σ = 2742782. Its totient is φ = 2742780.

The previous prime is 2742769. The next prime is 2742793. The reversal of 2742781 is 1872472.

It is a balanced prime because it is at equal distance from previous prime (2742769) and next prime (2742793).

It can be written as a sum of positive squares in only one way, i.e., 1512900 + 1229881 = 1230^2 + 1109^2 .

It is a cyclic number.

It is not a de Polignac number, because 2742781 - 2⁵ = 2742749 is a prime.

It is a super-2 number, since 2×2742781² = 15045695227922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2742721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1371390 + 1371391.

It is an arithmetic number, because the mean of its divisors is an integer number (1371391).

2^2742781 is an apocalyptic number.

It is an amenable number.

2742781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2742781 is an equidigital number, since it uses as much as digits as its factorization.

2742781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6272, while the sum is 31.

The square root of 2742781 is about 1656.1343544532. The cubic root of 2742781 is about 139.9792656368.

The spelling of 2742781 in words is "two million, seven hundred forty-two thousand, seven hundred eighty-one".