1287727164 has 36 divisors (see below), whose sum is σ = 3258879624. Its totient is φ = 428742432.

The previous prime is 1287727159. The next prime is 1287727171. The reversal of 1287727164 is 4617277821.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11179 + ... + 51965.

It is an arithmetic number, because the mean of its divisors is an integer number (90524434).

Almost surely, 2^1287727164 is an apocalyptic number.

It is an amenable number.

1287727164 is an abundant number, since it is smaller than the sum of its proper divisors (1971152460).

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

1287727164 is a wasteful number, since it uses less digits than its factorization.

1287727164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41674 (or 41669 counting only the distinct ones).

The product of its digits is 263424, while the sum is 45.

The square root of 1287727164 is about 35884.9155495732. The cubic root of 1287727164 is about 1087.9475345501.

The spelling of 1287727164 in words is "one billion, two hundred eighty-seven million, seven hundred twenty-seven thousand, one hundred sixty-four".