5215121 has 2 divisors, whose sum is σ = 5215122. Its totient is φ = 5215120.

The previous prime is 5215097. The next prime is 5215127. The reversal of 5215121 is 1215125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4774225 + 440896 = 2185^2 + 664^2 .

It is a cyclic number.

It is not a de Polignac number, because 5215121 - 2⁶ = 5215057 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5215121.

It is not a weakly prime, because it can be changed into another prime (5215127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2607560 + 2607561.

It is an arithmetic number, because the mean of its divisors is an integer number (2607561).

Almost surely, 2^5215121 is an apocalyptic number.

It is an amenable number.

5215121 is a deficient number, since it is larger than the sum of its proper divisors (1).

5215121 is an equidigital number, since it uses as much as digits as its factorization.

5215121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100, while the sum is 17.

The square root of 5215121 is about 2283.6639420020. The cubic root of 5215121 is about 173.4155867832.

The spelling of 5215121 in words is "five million, two hundred fifteen thousand, one hundred twenty-one".