1287686152 has 8 divisors (see below), whose sum is σ = 2414411550. Its totient is φ = 643843072.

The previous prime is 1287686129. The next prime is 1287686219. The reversal of 1287686152 is 2516867821.

It can be written as a sum of positive squares in only one way, i.e., 1170050436 + 117635716 = 34206^2 + 10846^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80480377 + ... + 80480392.

Almost surely, 2^1287686152 is an apocalyptic number.

It is an amenable number.

1287686152 is a deficient number, since it is larger than the sum of its proper divisors (1126725398).

1287686152 is a wasteful number, since it uses less digits than its factorization.

1287686152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160960775 (or 160960771 counting only the distinct ones).

The product of its digits is 322560, while the sum is 46.

The square root of 1287686152 is about 35884.3441071451. The cubic root of 1287686152 is about 1087.9359846455.

The spelling of 1287686152 in words is "one billion, two hundred eighty-seven million, six hundred eighty-six thousand, one hundred fifty-two".