2569139 has 4 divisors (see below), whose sum is σ = 2657760. Its totient is φ = 2480520.

The previous prime is 2569117. The next prime is 2569157. The reversal of 2569139 is 9319652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2569139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2569099 and 2569108.

It is not an unprimeable number, because it can be changed into a prime (2569109) 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, 44267 + ... + 44324.

It is an arithmetic number, because the mean of its divisors is an integer number (664440).

2^2569139 is an apocalyptic number.

2569139 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2569139 is a deficient number, since it is larger than the sum of its proper divisors (88621).

2569139 is an equidigital number, since it uses as much as digits as its factorization.

2569139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88620.

The product of its digits is 14580, while the sum is 35.

The square root of 2569139 is about 1602.8533931711. The cubic root of 2569139 is about 136.9606685538.

The spelling of 2569139 in words is "two million, five hundred sixty-nine thousand, one hundred thirty-nine".