1252815144 has 48 divisors (see below), whose sum is σ = 3643394400. Its totient is φ = 357946848.

The previous prime is 1252815107. The next prime is 1252815149. The reversal of 1252815144 is 4415182521.

It is not an unprimeable number, because it can be changed into a prime (1252815149) 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, 531484 + ... + 533835.

It is an arithmetic number, because the mean of its divisors is an integer number (75904050).

Almost surely, 2^1252815144 is an apocalyptic number.

1252815144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1252815144 is an abundant number, since it is smaller than the sum of its proper divisors (2390579256).

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

1252815144 is a wasteful number, since it uses less digits than its factorization.

1252815144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065342 (or 1065331 counting only the distinct ones).

The product of its digits is 12800, while the sum is 33.

The square root of 1252815144 is about 35395.1288173952. The cubic root of 1252815144 is about 1078.0254112186.

Adding to 1252815144 its reverse (4415182521), we get a palindrome (5667997665).

It can be divided in two parts, 12528 and 15144, that added together give a palindrome (27672).

The spelling of 1252815144 in words is "one billion, two hundred fifty-two million, eight hundred fifteen thousand, one hundred forty-four".