15132121 has 2 divisors, whose sum is σ = 15132122. Its totient is φ = 15132120.

The previous prime is 15132119. The next prime is 15132133. The reversal of 15132121 is 12123151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14523721 + 608400 = 3811^2 + 780^2 .

It is an emirp because it is prime and its reverse (12123151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15132121 - 2¹ = 15132119 is a prime.

Together with 15132119, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 15132095 and 15132104.

It is not a weakly prime, because it can be changed into another prime (15132101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7566060 + 7566061.

It is an arithmetic number, because the mean of its divisors is an integer number (7566061).

Almost surely, 2^15132121 is an apocalyptic number.

It is an amenable number.

15132121 is a deficient number, since it is larger than the sum of its proper divisors (1).

15132121 is an equidigital number, since it uses as much as digits as its factorization.

15132121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60, while the sum is 16.

The square root of 15132121 is about 3890.0026992279. The cubic root of 15132121 is about 247.3431771901.

Adding to 15132121 its reverse (12123151), we get a palindrome (27255272).

The spelling of 15132121 in words is "fifteen million, one hundred thirty-two thousand, one hundred twenty-one".