1252531144 has 8 divisors (see below), whose sum is σ = 2348495910. Its totient is φ = 626265568.

The previous prime is 1252531127. The next prime is 1252531157. The reversal of 1252531144 is 4411352521.

It can be written as a sum of positive squares in only one way, i.e., 770728644 + 481802500 = 27762^2 + 21950^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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, 78283189 + ... + 78283204.

Almost surely, 2^1252531144 is an apocalyptic number.

It is an amenable number.

1252531144 is a deficient number, since it is larger than the sum of its proper divisors (1095964766).

1252531144 is a wasteful number, since it uses less digits than its factorization.

1252531144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156566399 (or 156566395 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 1252531144 is about 35391.1167385264. The cubic root of 1252531144 is about 1077.9439460598.

Adding to 1252531144 its reverse (4411352521), we get a palindrome (5663883665).

The spelling of 1252531144 in words is "one billion, two hundred fifty-two million, five hundred thirty-one thousand, one hundred forty-four".