1287232 has 14 divisors (see below), whose sum is σ = 2554478. Its totient is φ = 643584.

The previous prime is 1287217. The next prime is 1287233. The reversal of 1287232 is 2327821.

It can be written as a sum of positive squares in only one way, i.e., 802816 + 484416 = 896^2 + 696^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1287197 and 1287206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9993 + ... + 10120.

2^1287232 is an apocalyptic number.

It is an amenable number.

1287232 is a deficient number, since it is larger than the sum of its proper divisors (1267246).

1287232 is an equidigital number, since it uses as much as digits as its factorization.

1287232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20125 (or 20115 counting only the distinct ones).

The product of its digits is 1344, while the sum is 25.

The square root of 1287232 is about 1134.5624707349. The cubic root of 1287232 is about 108.7808068797.

The spelling of 1287232 in words is "one million, two hundred eighty-seven thousand, two hundred thirty-two".