2726021 has 4 divisors (see below), whose sum is σ = 2731212. Its totient is φ = 2720832.

The previous prime is 2725997. The next prime is 2726023. The reversal of 2726021 is 1206272.

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 835396 + 1890625 = 914^2 + 1375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2726021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2725984 and 2726002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2726023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1706 + ... + 2891.

It is an arithmetic number, because the mean of its divisors is an integer number (682803).

2^2726021 is an apocalyptic number.

It is an amenable number.

2726021 is a deficient number, since it is larger than the sum of its proper divisors (5191).

2726021 is an equidigital number, since it uses as much as digits as its factorization.

2726021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5190.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 2726021 is about 1651.0666249428. The cubic root of 2726021 is about 139.6935644493.

The spelling of 2726021 in words is "two million, seven hundred twenty-six thousand, twenty-one".