1299639214972 has 18 divisors (see below), whose sum is σ = 2599290494808. Its totient is φ = 556985649672.

The previous prime is 1299639214963. The next prime is 1299639214987. The reversal of 1299639214972 is 2794129369921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5924683 + ... + 6140125.

Almost surely, 2^{1299639214972} is an apocalyptic number.

It is an amenable number.

1299639214972 is an abundant number, since it is smaller than the sum of its proper divisors (1299651279836).

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

1299639214972 is an frugal number, since it uses more digits than its factorization.

1299639214972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430897 (or 215452 counting only the distinct ones).

The product of its digits is 26453952, while the sum is 64.

The spelling of 1299639214972 in words is "one trillion, two hundred ninety-nine billion, six hundred thirty-nine million, two hundred fourteen thousand, nine hundred seventy-two".