2725021 has 8 divisors (see below), whose sum is σ = 2966264. Its totient is φ = 2488320.

The previous prime is 2725003. The next prime is 2725027. The reversal of 2725021 is 1205272.

2725021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 148996 + 2576025 = 386^2 + 1605^2 .

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

It is a 6-Lehmer number, since φ(2725021) divides (2725021-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 2725021 - 2⁵ = 2724989 is a prime.

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 2725021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2725027) 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, 181 + ... + 2341.

It is an arithmetic number, because the mean of its divisors is an integer number (370783).

2^2725021 is an apocalyptic number.

It is an amenable number.

2725021 is a deficient number, since it is larger than the sum of its proper divisors (241243).

2725021 is a wasteful number, since it uses less digits than its factorization.

2725021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 2725021 is about 1650.7637626263. The cubic root of 2725021 is about 139.6764808625.

The spelling of 2725021 in words is "two million, seven hundred twenty-five thousand, twenty-one".