2599561 has 8 divisors (see below), whose sum is σ = 2751200. Its totient is φ = 2456244.

The previous prime is 2599559. The next prime is 2599573. The reversal of 2599561 is 1659952.

2599561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2599561 - 2¹ = 2599559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2599561.

It is not an unprimeable number, because it can be changed into a prime (2599501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6670 + ... + 7048.

It is an arithmetic number, because the mean of its divisors is an integer number (343900).

2^2599561 is an apocalyptic number.

It is an amenable number.

2599561 is a deficient number, since it is larger than the sum of its proper divisors (151639).

2599561 is an frugal number, since it uses more digits than its factorization.

2599561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436 (or 398 counting only the distinct ones).

The product of its digits is 24300, while the sum is 37.

The square root of 2599561 is about 1612.3154157918. The cubic root of 2599561 is about 137.4991471021.

It can be divided in two parts, 2599 and 561, that added together give a triangular number (3160 = T₇₉).

The spelling of 2599561 in words is "two million, five hundred ninety-nine thousand, five hundred sixty-one".