1287954912 has 48 divisors (see below), whose sum is σ = 3452827392. Its totient is φ = 420182400.

The previous prime is 1287954911. The next prime is 1287954949. The reversal of 1287954912 is 2194597821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287954911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138214 + ... + 147237.

It is an arithmetic number, because the mean of its divisors is an integer number (71933904).

Almost surely, 2^1287954912 is an apocalyptic number.

1287954912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1287954912 is an abundant number, since it is smaller than the sum of its proper divisors (2164872480).

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

1287954912 is a wasteful number, since it uses less digits than its factorization.

1287954912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285511 (or 285503 counting only the distinct ones).

The product of its digits is 362880, while the sum is 48.

The square root of 1287954912 is about 35888.0887203540. The cubic root of 1287954912 is about 1088.0116690646.

The spelling of 1287954912 in words is "one billion, two hundred eighty-seven million, nine hundred fifty-four thousand, nine hundred twelve".