1252400431122 has 24 divisors (see below), whose sum is σ = 2713585129164. Its totient is φ = 417458985504.

The previous prime is 1252400431099. The next prime is 1252400431123. The reversal of 1252400431122 is 2211340042521.

1252400431122 is a `hidden beast` number, since 1 + 252 + 400 + 4 + 3 + 1 + 1 + 2 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1232479649241 + 19920781881 = 1110171^2 + 141141^2 .

It is not an unprimeable number, because it can be changed into a prime (1252400431123) 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 11 ways as a sum of consecutive naturals, for example, 378988 + ... + 1627400.

Almost surely, 2^{1252400431122} is an apocalyptic number.

1252400431122 is an abundant number, since it is smaller than the sum of its proper divisors (1461184698042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1252400431122 is a wasteful number, since it uses less digits than its factorization.

1252400431122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304154 (or 1304151 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 1252400431122 its reverse (2211340042521), we get a palindrome (3463740473643).

The spelling of 1252400431122 in words is "one trillion, two hundred fifty-two billion, four hundred million, four hundred thirty-one thousand, one hundred twenty-two".