1286733972 has 12 divisors (see below), whose sum is σ = 3002379296. Its totient is φ = 428911320.

The previous prime is 1286733971. The next prime is 1286734069. The reversal of 1286733972 is 2793376821.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1286733971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53613904 + ... + 53613927.

Almost surely, 2^1286733972 is an apocalyptic number.

1286733972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1286733972 is an abundant number, since it is smaller than the sum of its proper divisors (1715645324).

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

1286733972 is a wasteful number, since it uses less digits than its factorization.

1286733972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107227838 (or 107227836 counting only the distinct ones).

The product of its digits is 762048, while the sum is 48.

The square root of 1286733972 is about 35871.0743078598. The cubic root of 1286733972 is about 1087.6677603000.

The spelling of 1286733972 in words is "one billion, two hundred eighty-six million, seven hundred thirty-three thousand, nine hundred seventy-two".