153243121 has 2 divisors, whose sum is σ = 153243122. Its totient is φ = 153243120.

The previous prime is 153243109. The next prime is 153243127. The reversal of 153243121 is 121342351.

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., 140541025 + 12702096 = 11855^2 + 3564^2 .

It is a cyclic number.

It is not a de Polignac number, because 153243121 - 2¹⁵ = 153210353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 153243092 and 153243101.

It is not a weakly prime, because it can be changed into another prime (153243127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76621560 + 76621561.

It is an arithmetic number, because the mean of its divisors is an integer number (76621561).

Almost surely, 2^153243121 is an apocalyptic number.

It is an amenable number.

153243121 is a deficient number, since it is larger than the sum of its proper divisors (1).

153243121 is an equidigital number, since it uses as much as digits as its factorization.

153243121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 22.

The square root of 153243121 is about 12379.1405598289. The cubic root of 153243121 is about 535.1312700855.

Adding to 153243121 its reverse (121342351), we get a palindrome (274585472).

The spelling of 153243121 in words is "one hundred fifty-three million, two hundred forty-three thousand, one hundred twenty-one".