7528121 has 2 divisors, whose sum is σ = 7528122. Its totient is φ = 7528120.

The previous prime is 7528111. The next prime is 7528141. The reversal of 7528121 is 1218257.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6446521 + 1081600 = 2539^2 + 1040^2 .

It is an emirp because it is prime and its reverse (1218257) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7528121 - 2¹⁴ = 7511737 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7528111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3764060 + 3764061.

It is an arithmetic number, because the mean of its divisors is an integer number (3764061).

Almost surely, 2^7528121 is an apocalyptic number.

It is an amenable number.

7528121 is a deficient number, since it is larger than the sum of its proper divisors (1).

7528121 is an equidigital number, since it uses as much as digits as its factorization.

7528121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 26.

The square root of 7528121 is about 2743.7421526084. The cubic root of 7528121 is about 195.9877213605.

The spelling of 7528121 in words is "seven million, five hundred twenty-eight thousand, one hundred twenty-one".