2145599 has 4 divisors (see below), whose sum is σ = 2186136. Its totient is φ = 2105064.

The previous prime is 2145551. The next prime is 2145617. The reversal of 2145599 is 9955412.

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

It is a cyclic number.

It is not a de Polignac number, because 2145599 - 2⁸ = 2145343 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 (2145529) 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, 20189 + ... + 20294.

It is an arithmetic number, because the mean of its divisors is an integer number (546534).

2^2145599 is an apocalyptic number.

2145599 is a deficient number, since it is larger than the sum of its proper divisors (40537).

2145599 is an equidigital number, since it uses as much as digits as its factorization.

2145599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40536.

The product of its digits is 16200, while the sum is 35.

The square root of 2145599 is about 1464.7863325414. The cubic root of 2145599 is about 128.9781626798.

It can be divided in two parts, 2145 and 599, that added together give a cube (2744 = 14³).

The spelling of 2145599 in words is "two million, one hundred forty-five thousand, five hundred ninety-nine".