2671221 has 16 divisors (see below), whose sum is σ = 4105728. Its totient is φ = 1513200.

The previous prime is 2671211. The next prime is 2671231. The reversal of 2671221 is 1221762.

It is an interprime number because it is at equal distance from previous prime (2671211) and next prime (2671231).

It is not a de Polignac number, because 2671221 - 2⁷ = 2671093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

2671221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2671211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2266 + ... + 3236.

It is an arithmetic number, because the mean of its divisors is an integer number (256608).

2^2671221 is an apocalyptic number.

2671221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2671221 is a deficient number, since it is larger than the sum of its proper divisors (1434507).

2671221 is a wasteful number, since it uses less digits than its factorization.

2671221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112.

The product of its digits is 336, while the sum is 21.

The square root of 2671221 is about 1634.3870410646. The cubic root of 2671221 is about 138.7511549291.

Adding to 2671221 its reverse (1221762), we get a palindrome (3892983).

The spelling of 2671221 in words is "two million, six hundred seventy-one thousand, two hundred twenty-one".