1287879612 has 48 divisors (see below), whose sum is σ = 3066336000. Its totient is φ = 420588160.

The previous prime is 1287879611. The next prime is 1287879629. The reversal of 1287879612 is 2169787821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287879611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217264 + ... + 223112.

It is an arithmetic number, because the mean of its divisors is an integer number (63882000).

Almost surely, 2^1287879612 is an apocalyptic number.

1287879612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1287879612 is an abundant number, since it is smaller than the sum of its proper divisors (1778456388).

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

1287879612 is a wasteful number, since it uses less digits than its factorization.

1287879612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6226 (or 6224 counting only the distinct ones).

The product of its digits is 677376, while the sum is 51.

The square root of 1287879612 is about 35887.0396104220. The cubic root of 1287879612 is about 1087.9904651972.

The spelling of 1287879612 in words is "one billion, two hundred eighty-seven million, eight hundred seventy-nine thousand, six hundred twelve".