2641729 has 4 divisors (see below), whose sum is σ = 2697984. Its totient is φ = 2585476.

The previous prime is 2641687. The next prime is 2641739. The reversal of 2641729 is 9271462.

2641729 is nontrivially palindromic in base 9.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9271462 = 2 ⋅4635731.

It is a cyclic number.

It is not a de Polignac number, because 2641729 - 2⁹ = 2641217 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 2641729.

It is not an unprimeable number, because it can be changed into a prime (2641739) 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, 28057 + ... + 28150.

It is an arithmetic number, because the mean of its divisors is an integer number (674496).

2^2641729 is an apocalyptic number.

It is an amenable number.

2641729 is a deficient number, since it is larger than the sum of its proper divisors (56255).

2641729 is an equidigital number, since it uses as much as digits as its factorization.

2641729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56254.

The product of its digits is 6048, while the sum is 31.

The square root of 2641729 is about 1625.3396568102. The cubic root of 2641729 is about 138.2386300405.

The spelling of 2641729 in words is "two million, six hundred forty-one thousand, seven hundred twenty-nine".