1287733225 has 9 divisors (see below), whose sum is σ = 1597011717. Its totient is φ = 1030043040.

The previous prime is 1287733219. The next prime is 1287733243. The reversal of 1287733225 is 5223377821.

The square root of 1287733225 is 35885.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 179908569 + 1107824656 = 13413^2 + 33284^2 .

It is not a de Polignac number, because 1287733225 - 2⁹ = 1287732713 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 8 ways as a sum of consecutive naturals, for example, 175837 + ... + 183013.

Almost surely, 2^1287733225 is an apocalyptic number.

1287733225 is the 35885-th square number.

1287733225 is the 17943-rd centered octagonal number.

It is an amenable number.

1287733225 is a deficient number, since it is larger than the sum of its proper divisors (309278492).

1287733225 is an frugal number, since it uses more digits than its factorization.

1287733225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14364 (or 7182 counting only the distinct ones).

The product of its digits is 141120, while the sum is 40.

The cubic root of 1287733225 is about 1087.9492414437.

The spelling of 1287733225 in words is "one billion, two hundred eighty-seven million, seven hundred thirty-three thousand, two hundred twenty-five".