2645729 has 4 divisors (see below), whose sum is σ = 2658480. Its totient is φ = 2632980.

The previous prime is 2645723. The next prime is 2645743. The reversal of 2645729 is 9275462.

2645729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2645729 - 2¹² = 2641633 is a prime.

It is a d-powerful number, because it can be written as 2⁵ + 6² + 4⁴ + 5 + 7⁵ + 2²¹ + 9⁶ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2645723) 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 3 ways as a sum of consecutive naturals, for example, 6059 + ... + 6480.

It is an arithmetic number, because the mean of its divisors is an integer number (664620).

2^2645729 is an apocalyptic number.

It is an amenable number.

2645729 is a deficient number, since it is larger than the sum of its proper divisors (12751).

2645729 is a wasteful number, since it uses less digits than its factorization.

2645729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12750.

The product of its digits is 30240, while the sum is 35.

The square root of 2645729 is about 1626.5697033942. The cubic root of 2645729 is about 138.3083666495.

The spelling of 2645729 in words is "two million, six hundred forty-five thousand, seven hundred twenty-nine".