2729561 has 4 divisors (see below), whose sum is σ = 2733072. Its totient is φ = 2726052.

The previous prime is 2729557. The next prime is 2729563. The reversal of 2729561 is 1659272.

2729561 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2729561 - 2² = 2729557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2729563) 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, 11 + ... + 2336.

It is an arithmetic number, because the mean of its divisors is an integer number (683268).

2^2729561 is an apocalyptic number.

It is an amenable number.

2729561 is a deficient number, since it is larger than the sum of its proper divisors (3511).

2729561 is a wasteful number, since it uses less digits than its factorization.

2729561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3510.

The product of its digits is 7560, while the sum is 32.

The square root of 2729561 is about 1652.1383114013. The cubic root of 2729561 is about 139.7540067954.

The spelling of 2729561 in words is "two million, seven hundred twenty-nine thousand, five hundred sixty-one".