1284720974139 has 8 divisors (see below), whose sum is σ = 1768218115072. Its totient is φ = 828852241320.

The previous prime is 1284720974123. The next prime is 1284720974161. The reversal of 1284720974139 is 9314790274821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1284720974139 - 2⁴ = 1284720974123 is a prime.

It is a super-2 number, since 2×1284720974139² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1284720974039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6907101919 + ... + 6907102104.

It is an arithmetic number, because the mean of its divisors is an integer number (221027264384).

Almost surely, 2^{1284720974139} is an apocalyptic number.

1284720974139 is a deficient number, since it is larger than the sum of its proper divisors (483497140933).

1284720974139 is a wasteful number, since it uses less digits than its factorization.

1284720974139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13814204057.

The product of its (nonzero) digits is 6096384, while the sum is 57.

The spelling of 1284720974139 in words is "one trillion, two hundred eighty-four billion, seven hundred twenty million, nine hundred seventy-four thousand, one hundred thirty-nine".