252142121 has 16 divisors (see below), whose sum is σ = 316483200. Its totient is φ = 195146880.

The previous prime is 252142109. The next prime is 252142129. The reversal of 252142121 is 121241252.

It is a cyclic number.

It is not a de Polignac number, because 252142121 - 2⁶ = 252142057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 252142093 and 252142102.

It is not an unprimeable number, because it can be changed into a prime (252142129) 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 in 15 ways as a sum of consecutive naturals, for example, 485 + ... + 22461.

It is an arithmetic number, because the mean of its divisors is an integer number (19780200).

Almost surely, 2^252142121 is an apocalyptic number.

It is an amenable number.

252142121 is a deficient number, since it is larger than the sum of its proper divisors (64341079).

252142121 is a wasteful number, since it uses less digits than its factorization.

252142121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22144.

The product of its digits is 320, while the sum is 20.

The square root of 252142121 is about 15878.9836261645. The cubic root of 252142121 is about 631.7546791622.

Adding to 252142121 its reverse (121241252), we get a palindrome (373383373).

The spelling of 252142121 in words is "two hundred fifty-two million, one hundred forty-two thousand, one hundred twenty-one".