1252512565 has 8 divisors (see below), whose sum is σ = 1503205560. Its totient is φ = 1001883072.

The previous prime is 1252512563. The next prime is 1252512571. The reversal of 1252512565 is 5652152521.

It can be written as a sum of positive squares in 4 ways, for example, as 157101156 + 1095411409 = 12534^2 + 33097^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1252512565 - 2¹ = 1252512563 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1252512565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252512563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64807 + ... + 81883.

It is an arithmetic number, because the mean of its divisors is an integer number (187900695).

Almost surely, 2^1252512565 is an apocalyptic number.

It is an amenable number.

1252512565 is a deficient number, since it is larger than the sum of its proper divisors (250692995).

1252512565 is a wasteful number, since it uses less digits than its factorization.

1252512565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31751.

The product of its digits is 30000, while the sum is 34.

The square root of 1252512565 is about 35390.8542564318. The cubic root of 1252512565 is about 1077.9386162603.

The spelling of 1252512565 in words is "one billion, two hundred fifty-two million, five hundred twelve thousand, five hundred sixty-five".