7162821 has 12 divisors (see below), whose sum is σ = 10796448. Its totient is φ = 4567464.

The previous prime is 7162807. The next prime is 7162843. The reversal of 7162821 is 1282617.

It is not a de Polignac number, because 7162821 - 2¹⁴ = 7146437 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

7162821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7162861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17095 + ... + 17508.

It is an arithmetic number, because the mean of its divisors is an integer number (899704).

Almost surely, 2^7162821 is an apocalyptic number.

It is an amenable number.

7162821 is a deficient number, since it is larger than the sum of its proper divisors (3633627).

7162821 is a wasteful number, since it uses less digits than its factorization.

7162821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34632 (or 34629 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 7162821 is about 2676.3447087399. The cubic root of 7162821 is about 192.7649334622.

The spelling of 7162821 in words is "seven million, one hundred sixty-two thousand, eight hundred twenty-one".