1287267125 has 8 divisors (see below), whose sum is σ = 1606509528. Its totient is φ = 1029813600.

The previous prime is 1287267083. The next prime is 1287267139. The reversal of 1287267125 is 5217627821.

It can be written as a sum of positive squares in 4 ways, for example, as 67930564 + 1219336561 = 8242^2 + 34919^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1287267125 is a prime.

It is a super-2 number, since 2×1287267125² = 3314113302211531250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5148944 + ... + 5149193.

It is an arithmetic number, because the mean of its divisors is an integer number (200813691).

Almost surely, 2^1287267125 is an apocalyptic number.

It is an amenable number.

1287267125 is a deficient number, since it is larger than the sum of its proper divisors (319242403).

1287267125 is an equidigital number, since it uses as much as digits as its factorization.

1287267125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10298152 (or 10298142 counting only the distinct ones).

The product of its digits is 94080, while the sum is 41.

The square root of 1287267125 is about 35878.5050552556. The cubic root of 1287267125 is about 1087.8179631310.

It can be divided in two parts, 12872 and 67125, that added together give a palindrome (79997).

The spelling of 1287267125 in words is "one billion, two hundred eighty-seven million, two hundred sixty-seven thousand, one hundred twenty-five".