1287086964 has 12 divisors (see below), whose sum is σ = 3003202944. Its totient is φ = 429028984.

The previous prime is 1287086959. The next prime is 1287086971. The reversal of 1287086964 is 4696807821.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 53628612 + ... + 53628635.

It is an arithmetic number, because the mean of its divisors is an integer number (250266912).

Almost surely, 2^1287086964 is an apocalyptic number.

It is an amenable number.

1287086964 is an abundant number, since it is smaller than the sum of its proper divisors (1716115980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1287086964 is a wasteful number, since it uses less digits than its factorization.

1287086964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107257254 (or 107257252 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 51.

The square root of 1287086964 is about 35875.9942579993. The cubic root of 1287086964 is about 1087.7672118114.

The spelling of 1287086964 in words is "one billion, two hundred eighty-seven million, eighty-six thousand, nine hundred sixty-four".