252315121 has 2 divisors, whose sum is σ = 252315122. Its totient is φ = 252315120.

The previous prime is 252315113. The next prime is 252315131. The reversal of 252315121 is 121513252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179024400 + 73290721 = 13380^2 + 8561^2 .

It is a cyclic number.

It is not a de Polignac number, because 252315121 - 2³ = 252315113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 252315092 and 252315101.

It is not a weakly prime, because it can be changed into another prime (252315131) 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, 126157560 + 126157561.

It is an arithmetic number, because the mean of its divisors is an integer number (126157561).

Almost surely, 2^252315121 is an apocalyptic number.

It is an amenable number.

252315121 is a deficient number, since it is larger than the sum of its proper divisors (1).

252315121 is an equidigital number, since it uses as much as digits as its factorization.

252315121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 600, while the sum is 22.

The square root of 252315121 is about 15884.4301440121. The cubic root of 252315121 is about 631.8991328436.

Adding to 252315121 its reverse (121513252), we get a palindrome (373828373).

The spelling of 252315121 in words is "two hundred fifty-two million, three hundred fifteen thousand, one hundred twenty-one".