7121682 has 20 divisors (see below), whose sum is σ = 15958206. Its totient is φ = 2373840.

The previous prime is 7121669. The next prime is 7121683. The reversal of 7121682 is 2861217.

It can be written as a sum of positive squares in only one way, i.e., 5022081 + 2099601 = 2241^2 + 1449^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (7121683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 21819 + ... + 22142.

Almost surely, 2^7121682 is an apocalyptic number.

7121682 is an abundant number, since it is smaller than the sum of its proper divisors (8836524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7121682 is a wasteful number, since it uses less digits than its factorization.

7121682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43975 (or 43966 counting only the distinct ones).

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

The square root of 7121682 is about 2668.6479722886. The cubic root of 7121682 is about 192.3951821558.

Adding to 7121682 its reverse (2861217), we get a palindrome (9982899).

The spelling of 7121682 in words is "seven million, one hundred twenty-one thousand, six hundred eighty-two".