2751221 has 8 divisors (see below), whose sum is σ = 3046944. Its totient is φ = 2463120.

The previous prime is 2751193. The next prime is 2751241. The reversal of 2751221 is 1221572.

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

It is not a de Polignac number, because 2751221 - 2¹⁰ = 2750197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2751193 and 2751202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2751241) 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, 1130 + ... + 2603.

It is an arithmetic number, because the mean of its divisors is an integer number (380868).

2^2751221 is an apocalyptic number.

It is an amenable number.

2751221 is a deficient number, since it is larger than the sum of its proper divisors (295723).

2751221 is a wasteful number, since it uses less digits than its factorization.

2751221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3811.

The product of its digits is 280, while the sum is 20.

The square root of 2751221 is about 1658.6804996744. The cubic root of 2751221 is about 140.1226985558.

Adding to 2751221 its reverse (1221572), we get a palindrome (3972793).

The spelling of 2751221 in words is "two million, seven hundred fifty-one thousand, two hundred twenty-one".