7282821 has 48 divisors (see below), whose sum is σ = 12614784. Its totient is φ = 3701376.

The previous prime is 7282819. The next prime is 7282823. The reversal of 7282821 is 1282827.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7282819) and next prime (7282823).

It is not a de Polignac number, because 7282821 - 2¹ = 7282819 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7282823) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70656 + ... + 70758.

It is an arithmetic number, because the mean of its divisors is an integer number (262808).

Almost surely, 2^7282821 is an apocalyptic number.

It is an amenable number.

7282821 is a deficient number, since it is larger than the sum of its proper divisors (5331963).

7282821 is a wasteful number, since it uses less digits than its factorization.

7282821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 163 counting only the distinct ones).

The product of its digits is 3584, while the sum is 30.

The square root of 7282821 is about 2698.6702280938. The cubic root of 7282821 is about 193.8354522820.

The spelling of 7282821 in words is "seven million, two hundred eighty-two thousand, eight hundred twenty-one".