2725639 has 8 divisors (see below), whose sum is σ = 3191328. Its totient is φ = 2279040.

The previous prime is 2725621. The next prime is 2725643. The reversal of 2725639 is 9365272.

It is a happy number.

2725639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2725639 - 2⁹ = 2725127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2725649) 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 7 ways as a sum of consecutive naturals, for example, 4462 + ... + 5035.

It is an arithmetic number, because the mean of its divisors is an integer number (398916).

2^2725639 is an apocalyptic number.

2725639 is a deficient number, since it is larger than the sum of its proper divisors (465689).

2725639 is an equidigital number, since it uses as much as digits as its factorization.

2725639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9545.

The product of its digits is 22680, while the sum is 34.

The square root of 2725639 is about 1650.9509380960. The cubic root of 2725639 is about 139.6870390124.

It can be divided in two parts, 2725 and 639, that added together give a square (3364 = 58²).

The spelling of 2725639 in words is "two million, seven hundred twenty-five thousand, six hundred thirty-nine".