2744021 has 8 divisors (see below), whose sum is σ = 3320640. Its totient is φ = 2213568.

The previous prime is 2744017. The next prime is 2744029. The reversal of 2744021 is 1204472.

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

It is not a de Polignac number, because 2744021 - 2² = 2744017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2743984 and 2744002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2744029) 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, 11411 + ... + 11648.

It is an arithmetic number, because the mean of its divisors is an integer number (415080).

2^2744021 is an apocalyptic number.

It is an amenable number.

2744021 is a deficient number, since it is larger than the sum of its proper divisors (576619).

2744021 is a wasteful number, since it uses less digits than its factorization.

2744021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23083.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 2744021 is about 1656.5086779127. The cubic root of 2744021 is about 140.0003571419. Note that the first 3 decimals are identical.

Adding to 2744021 its reverse (1204472), we get a palindrome (3948493).

The spelling of 2744021 in words is "two million, seven hundred forty-four thousand, twenty-one".