7003121 has 2 divisors, whose sum is σ = 7003122. Its totient is φ = 7003120.

The previous prime is 7003111. The next prime is 7003127. The reversal of 7003121 is 1213007.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6574096 + 429025 = 2564^2 + 655^2 .

It is an emirp because it is prime and its reverse (1213007) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7003121 - 2⁶ = 7003057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7003096 and 7003105.

It is not a weakly prime, because it can be changed into another prime (7003127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3501560 + 3501561.

It is an arithmetic number, because the mean of its divisors is an integer number (3501561).

Almost surely, 2^7003121 is an apocalyptic number.

It is an amenable number.

7003121 is a deficient number, since it is larger than the sum of its proper divisors (1).

7003121 is an equidigital number, since it uses as much as digits as its factorization.

7003121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 7003121 is about 2646.3410588962. The cubic root of 7003121 is about 191.3215438541.

Adding to 7003121 its reverse (1213007), we get a palindrome (8216128).

The spelling of 7003121 in words is "seven million, three thousand, one hundred twenty-one".