1286135481 has 8 divisors (see below), whose sum is σ = 1715401120. Its totient is φ = 857146752.

The previous prime is 1286135423. The next prime is 1286135491. The reversal of 1286135481 is 1845316821.

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

It is not a de Polignac number, because 1286135481 - 2¹⁴ = 1286119097 is a prime.

It is a super-2 number, since 2×1286135481² = 3308288950974202722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1286135491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58135 + ... + 77148.

It is an arithmetic number, because the mean of its divisors is an integer number (214425140).

Almost surely, 2^1286135481 is an apocalyptic number.

It is an amenable number.

1286135481 is a deficient number, since it is larger than the sum of its proper divisors (429265639).

1286135481 is a wasteful number, since it uses less digits than its factorization.

1286135481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138455.

The product of its digits is 46080, while the sum is 39.

The square root of 1286135481 is about 35862.7310867424. The cubic root of 1286135481 is about 1087.4991006466.

The spelling of 1286135481 in words is "one billion, two hundred eighty-six million, one hundred thirty-five thousand, four hundred eighty-one".