1287001322 has 8 divisors (see below), whose sum is σ = 1941661476. Its totient is φ = 639780832.

The previous prime is 1287001307. The next prime is 1287001333. The reversal of 1287001322 is 2231007821.

It can be written as a sum of positive squares in 2 ways, for example, as 1271564281 + 15437041 = 35659^2 + 3929^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1287001291 and 1287001300.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1859483 + ... + 1860174.

Almost surely, 2^1287001322 is an apocalyptic number.

1287001322 is a deficient number, since it is larger than the sum of its proper divisors (654660154).

1287001322 is a wasteful number, since it uses less digits than its factorization.

1287001322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3719832.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1287001322 is about 35874.8006544984. The cubic root of 1287001322 is about 1087.7430848154.

The spelling of 1287001322 in words is "one billion, two hundred eighty-seven million, one thousand, three hundred twenty-two".