2766021 has 8 divisors (see below), whose sum is σ = 3710784. Its totient is φ = 1832640.

The previous prime is 2766013. The next prime is 2766059. The reversal of 2766021 is 1206672.

It is a happy number.

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

It is not a de Polignac number, because 2766021 - 2³ = 2766013 is a prime.

2766021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2765982 and 2766000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2766521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2260 + ... + 3261.

It is an arithmetic number, because the mean of its divisors is an integer number (463848).

2^2766021 is an apocalyptic number.

It is an amenable number.

2766021 is a deficient number, since it is larger than the sum of its proper divisors (944763).

2766021 is a wasteful number, since it uses less digits than its factorization.

2766021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5691.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 2766021 is about 1663.1358934254. The cubic root of 2766021 is about 140.3735094216.

The spelling of 2766021 in words is "two million, seven hundred sixty-six thousand, twenty-one".