15352121 has 2 divisors, whose sum is σ = 15352122. Its totient is φ = 15352120.

The previous prime is 15352087. The next prime is 15352123. The reversal of 15352121 is 12125351.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10240000 + 5112121 = 3200^2 + 2261^2 .

It is a cyclic number.

It is not a de Polignac number, because 15352121 - 2¹⁴ = 15335737 is a prime.

Together with 15352123, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 15352093 and 15352102.

It is not a weakly prime, because it can be changed into another prime (15352123) 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 as a sum of consecutive naturals, namely, 7676060 + 7676061.

It is an arithmetic number, because the mean of its divisors is an integer number (7676061).

Almost surely, 2^15352121 is an apocalyptic number.

It is an amenable number.

15352121 is a deficient number, since it is larger than the sum of its proper divisors (1).

15352121 is an equidigital number, since it uses as much as digits as its factorization.

15352121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 300, while the sum is 20.

The square root of 15352121 is about 3918.1782756786. The cubic root of 15352121 is about 248.5360899344.

Adding to 15352121 its reverse (12125351), we get a palindrome (27477472).

The spelling of 15352121 in words is "fifteen million, three hundred fifty-two thousand, one hundred twenty-one".