1252134121 has 16 divisors (see below), whose sum is σ = 1462489600. Its totient is φ = 1049899968.

The previous prime is 1252134109. The next prime is 1252134139. The reversal of 1252134121 is 1214312521.

It is a cyclic number.

It is not a de Polignac number, because 1252134121 - 2⁵ = 1252134089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1252134092 and 1252134101.

It is not an unprimeable number, because it can be changed into a prime (1252134721) 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, 49891 + ... + 70663.

It is an arithmetic number, because the mean of its divisors is an integer number (91405600).

Almost surely, 2^1252134121 is an apocalyptic number.

It is an amenable number.

1252134121 is a deficient number, since it is larger than the sum of its proper divisors (210355479).

1252134121 is a wasteful number, since it uses less digits than its factorization.

1252134121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20968.

The product of its digits is 480, while the sum is 22.

The square root of 1252134121 is about 35385.5072169384. The cubic root of 1252134121 is about 1077.8300397062.

Adding to 1252134121 its reverse (1214312521), we get a palindrome (2466446642).

The spelling of 1252134121 in words is "one billion, two hundred fifty-two million, one hundred thirty-four thousand, one hundred twenty-one".