2782123 has 2 divisors, whose sum is σ = 2782124. Its totient is φ = 2782122.

The previous prime is 2782111. The next prime is 2782127. The reversal of 2782123 is 3212872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2782123 - 2¹³ = 2773931 is a prime.

It is not a weakly prime, because it can be changed into another prime (2782127) 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 as a sum of consecutive naturals, namely, 1391061 + 1391062.

It is an arithmetic number, because the mean of its divisors is an integer number (1391062).

2^2782123 is an apocalyptic number.

2782123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2782123 is an equidigital number, since it uses as much as digits as its factorization.

2782123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 25.

The square root of 2782123 is about 1667.9697239459. The cubic root of 2782123 is about 140.6453707445.

Adding to 2782123 its reverse (3212872), we get a palindrome (5994995).

It can be divided in two parts, 278 and 2123, that added together give a 4-th power (2401 = 7⁴).

The spelling of 2782123 in words is "two million, seven hundred eighty-two thousand, one hundred twenty-three".