7127021 has 6 divisors (see below), whose sum is σ = 7833966. Its totient is φ = 6479000.

The previous prime is 7127009. The next prime is 7127027. The reversal of 7127021 is 1207217.

7127021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 4368100 + 2758921 = 2090^2 + 1661^2 .

It is not a de Polignac number, because 7127021 - 2¹⁴ = 7110637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7126984 and 7127002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7127027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29330 + ... + 29571.

It is an arithmetic number, because the mean of its divisors is an integer number (1305661).

Almost surely, 2^7127021 is an apocalyptic number.

It is an amenable number.

7127021 is a deficient number, since it is larger than the sum of its proper divisors (706945).

7127021 is a wasteful number, since it uses less digits than its factorization.

7127021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58923 (or 58912 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 7127021 is about 2669.6481041516. The cubic root of 7127021 is about 192.4432485767.

Adding to 7127021 its product of nonzero digits (196), we get a palindrome (7127217).

The spelling of 7127021 in words is "seven million, one hundred twenty-seven thousand, twenty-one".