2698561 has 4 divisors (see below), whose sum is σ = 2732800. Its totient is φ = 2664324.

The previous prime is 2698541. The next prime is 2698571. The reversal of 2698561 is 1658962.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2698561 - 2⁹ = 2698049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2698561.

It is not an unprimeable number, because it can be changed into a prime (2698541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17001 + ... + 17158.

It is an arithmetic number, because the mean of its divisors is an integer number (683200).

2^2698561 is an apocalyptic number.

It is an amenable number.

2698561 is a deficient number, since it is larger than the sum of its proper divisors (34239).

2698561 is an equidigital number, since it uses as much as digits as its factorization.

2698561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34238.

The product of its digits is 25920, while the sum is 37.

The square root of 2698561 is about 1642.7297404016. The cubic root of 2698561 is about 139.2229226629. Note that the first 3 decimals are identical.

The spelling of 2698561 in words is "two million, six hundred ninety-eight thousand, five hundred sixty-one".