1284130091 has 2 divisors, whose sum is σ = 1284130092. Its totient is φ = 1284130090.

The previous prime is 1284130087. The next prime is 1284130109. The reversal of 1284130091 is 1900314821.

Together with next prime (1284130109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1284130091 - 2² = 1284130087 is a prime.

It is a super-2 number, since 2×1284130091² = 3297980181223336562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1284130051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642065045 + 642065046.

It is an arithmetic number, because the mean of its divisors is an integer number (642065046).

Almost surely, 2^1284130091 is an apocalyptic number.

1284130091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1284130091 is an equidigital number, since it uses as much as digits as its factorization.

1284130091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1284130091 is about 35834.7609312522. The cubic root of 1284130091 is about 1086.9335836828.

The spelling of 1284130091 in words is "one billion, two hundred eighty-four million, one hundred thirty thousand, ninety-one".