2764021 has 8 divisors (see below), whose sum is σ = 2996280. Its totient is φ = 2534592.

The previous prime is 2764007. The next prime is 2764033. The reversal of 2764021 is 1204672.

It can be written as a sum of positive squares in 4 ways, for example, as 1347921 + 1416100 = 1161^2 + 1190^2 .

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 2764021 - 2⁵ = 2763989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2763983 and 2764001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2764001) 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, 1635 + ... + 2863.

It is an arithmetic number, because the mean of its divisors is an integer number (374535).

2^2764021 is an apocalyptic number.

It is an amenable number.

2764021 is a deficient number, since it is larger than the sum of its proper divisors (232259).

2764021 is a wasteful number, since it uses less digits than its factorization.

2764021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 2764021 is about 1662.5345109200. The cubic root of 2764021 is about 140.3396684262.

Adding to 2764021 its reverse (1204672), we get a palindrome (3968693).

The spelling of 2764021 in words is "two million, seven hundred sixty-four thousand, twenty-one".