2801729 has 4 divisors (see below), whose sum is σ = 3201984. Its totient is φ = 2401476.

The previous prime is 2801713. The next prime is 2801737. The reversal of 2801729 is 9271082.

It is a happy number.

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: 9271082 = 2 ⋅4635541.

It is not a de Polignac number, because 2801729 - 2⁴ = 2801713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2801789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200117 + ... + 200130.

It is an arithmetic number, because the mean of its divisors is an integer number (800496).

2^2801729 is an apocalyptic number.

It is an amenable number.

2801729 is a deficient number, since it is larger than the sum of its proper divisors (400255).

2801729 is an equidigital number, since it uses as much as digits as its factorization.

2801729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400254.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 2801729 is about 1673.8366109032. The cubic root of 2801729 is about 140.9749800516.

The spelling of 2801729 in words is "two million, eight hundred one thousand, seven hundred twenty-nine".