2669021 has 4 divisors (see below), whose sum is σ = 2699100. Its totient is φ = 2638944.

The previous prime is 2669011. The next prime is 2669047. The reversal of 2669021 is 1209662.

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 1428025 + 1240996 = 1195^2 + 1114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2669021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2669011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14906 + ... + 15083.

It is an arithmetic number, because the mean of its divisors is an integer number (674775).

2^2669021 is an apocalyptic number.

It is an amenable number.

2669021 is a deficient number, since it is larger than the sum of its proper divisors (30079).

2669021 is an equidigital number, since it uses as much as digits as its factorization.

2669021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30078.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 2669021 is about 1633.7138672362. The cubic root of 2669021 is about 138.7130529550.

The spelling of 2669021 in words is "two million, six hundred sixty-nine thousand, twenty-one".