1252487665 has 32 divisors (see below), whose sum is σ = 1869630336. Its totient is φ = 791362560.

The previous prime is 1252487651. The next prime is 1252487681. The reversal of 1252487665 is 5667842521.

It is not a de Polignac number, because 1252487665 - 2²⁷ = 1118269937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 39367 + ... + 63676.

It is an arithmetic number, because the mean of its divisors is an integer number (58425948).

Almost surely, 2^1252487665 is an apocalyptic number.

It is an amenable number.

1252487665 is a deficient number, since it is larger than the sum of its proper divisors (617142671).

1252487665 is a wasteful number, since it uses less digits than its factorization.

1252487665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103089.

The product of its digits is 806400, while the sum is 46.

The square root of 1252487665 is about 35390.5024688828. The cubic root of 1252487665 is about 1077.9314730586.

The spelling of 1252487665 in words is "one billion, two hundred fifty-two million, four hundred eighty-seven thousand, six hundred sixty-five".