2731601 has 4 divisors (see below), whose sum is σ = 2741604. Its totient is φ = 2721600.

The previous prime is 2731591. The next prime is 2731607. The reversal of 2731601 is 1061372.

It is a happy number.

2731601 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.

It can be written as a sum of positive squares in 2 ways, for example, as 774400 + 1957201 = 880^2 + 1399^2 .

It is a cyclic number.

It is not a de Polignac number, because 2731601 - 2¹⁰ = 2730577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2731607) 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, 4580 + ... + 5141.

It is an arithmetic number, because the mean of its divisors is an integer number (685401).

2^2731601 is an apocalyptic number.

It is an amenable number.

2731601 is a deficient number, since it is larger than the sum of its proper divisors (10003).

2731601 is an equidigital number, since it uses as much as digits as its factorization.

2731601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10002.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 2731601 is about 1652.7555778154. The cubic root of 2731601 is about 139.7888142459.

Adding to 2731601 its reverse (1061372), we get a palindrome (3792973).

The spelling of 2731601 in words is "two million, seven hundred thirty-one thousand, six hundred one".