2740221 has 24 divisors (see below), whose sum is σ = 4380480. Its totient is φ = 1636800.

The previous prime is 2740219. The next prime is 2740223. The reversal of 2740221 is 1220472.

It is an interprime number because it is at equal distance from previous prime (2740219) and next prime (2740223).

It is not a de Polignac number, because 2740221 - 2¹ = 2740219 is a prime.

It is a super-2 number, since 2×2740221² = 15017622257682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2740194 and 2740203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2740223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8656 + ... + 8966.

It is an arithmetic number, because the mean of its divisors is an integer number (182520).

2^2740221 is an apocalyptic number.

It is an amenable number.

2740221 is a deficient number, since it is larger than the sum of its proper divisors (1640259).

2740221 is a wasteful number, since it uses less digits than its factorization.

2740221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 414 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 2740221 is about 1655.3612898700. The cubic root of 2740221 is about 139.9357017666.

Adding to 2740221 its reverse (1220472), we get a palindrome (3960693).

The spelling of 2740221 in words is "two million, seven hundred forty thousand, two hundred twenty-one".