2599855 has 4 divisors (see below), whose sum is σ = 3119832. Its totient is φ = 2079880.

The previous prime is 2599847. The next prime is 2599859. The reversal of 2599855 is 5589952.

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

It is not a de Polignac number, because 2599855 - 2³ = 2599847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2599859) 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, 259981 + ... + 259990.

It is an arithmetic number, because the mean of its divisors is an integer number (779958).

2^2599855 is an apocalyptic number.

2599855 is a deficient number, since it is larger than the sum of its proper divisors (519977).

2599855 is an equidigital number, since it uses as much as digits as its factorization.

2599855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519976.

The product of its digits is 162000, while the sum is 43.

The square root of 2599855 is about 1612.4065864415. The cubic root of 2599855 is about 137.5043304421.

The spelling of 2599855 in words is "two million, five hundred ninety-nine thousand, eight hundred fifty-five".