1287286372 has 12 divisors (see below), whose sum is σ = 2253060796. Its totient is φ = 643554720.

The previous prime is 1287286331. The next prime is 1287286391. The reversal of 1287286372 is 2736827821.

It can be written as a sum of positive squares in 2 ways, for example, as 504182116 + 783104256 = 22454^2 + 27984^2 .

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, 19198 + ... + 54250.

Almost surely, 2^1287286372 is an apocalyptic number.

It is an amenable number.

1287286372 is a deficient number, since it is larger than the sum of its proper divisors (965774424).

1287286372 is a wasteful number, since it uses less digits than its factorization.

1287286372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44238 (or 44236 counting only the distinct ones).

The product of its digits is 451584, while the sum is 46.

The square root of 1287286372 is about 35878.7732789180. The cubic root of 1287286372 is about 1087.8233847272.

The spelling of 1287286372 in words is "one billion, two hundred eighty-seven million, two hundred eighty-six thousand, three hundred seventy-two".