2542779 has 16 divisors (see below), whose sum is σ = 3860640. Its totient is φ = 1653120.

The previous prime is 2542759. The next prime is 2542817. The reversal of 2542779 is 9772452.

It is a de Polignac number, because none of the positive numbers 2^k-2542779 is a prime.

2542779 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2542739) 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 15 ways as a sum of consecutive naturals, for example, 42 + ... + 2255.

It is an arithmetic number, because the mean of its divisors is an integer number (241290).

2^2542779 is an apocalyptic number.

2542779 is a deficient number, since it is larger than the sum of its proper divisors (1317861).

2542779 is a wasteful number, since it uses less digits than its factorization.

2542779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2347 (or 2341 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 2542779 is about 1594.6093565510. The cubic root of 2542779 is about 136.4906405852.

It can be divided in two parts, 2542 and 779, that added together give a triangular number (3321 = T₈₁).

The spelling of 2542779 in words is "two million, five hundred forty-two thousand, seven hundred seventy-nine".