1284881117 has 4 divisors (see below), whose sum is σ = 1383718140. Its totient is φ = 1186044096.

The previous prime is 1284881113. The next prime is 1284881119. The reversal of 1284881117 is 7111884821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7111884821 = 139 ⋅51164639.

It can be written as a sum of positive squares in 2 ways, for example, as 743434756 + 541446361 = 27266^2 + 23269^2 .

It is a cyclic number.

It is not a de Polignac number, because 1284881117 - 2² = 1284881113 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284881113) 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, 49418492 + ... + 49418517.

It is an arithmetic number, because the mean of its divisors is an integer number (345929535).

Almost surely, 2^1284881117 is an apocalyptic number.

It is an amenable number.

1284881117 is a deficient number, since it is larger than the sum of its proper divisors (98837023).

1284881117 is an equidigital number, since it uses as much as digits as its factorization.

1284881117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98837022.

The product of its digits is 28672, while the sum is 41.

The square root of 1284881117 is about 35845.2384146068. The cubic root of 1284881117 is about 1087.1454407986.

The spelling of 1284881117 in words is "one billion, two hundred eighty-four million, eight hundred eighty-one thousand, one hundred seventeen".