2799561 has 8 divisors (see below), whose sum is σ = 3758400. Its totient is φ = 1853552.

The previous prime is 2799557. The next prime is 2799581. The reversal of 2799561 is 1659972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2799561 - 2² = 2799557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2799551) 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 7 ways as a sum of consecutive naturals, for example, 2685 + ... + 3578.

It is an arithmetic number, because the mean of its divisors is an integer number (469800).

2^2799561 is an apocalyptic number.

It is an amenable number.

2799561 is a deficient number, since it is larger than the sum of its proper divisors (958839).

2799561 is a wasteful number, since it uses less digits than its factorization.

2799561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6415.

The product of its digits is 34020, while the sum is 39.

The square root of 2799561 is about 1673.1888715862. The cubic root of 2799561 is about 140.9386081512.

The spelling of 2799561 in words is "two million, seven hundred ninety-nine thousand, five hundred sixty-one".