1286135485 has 4 divisors (see below), whose sum is σ = 1543362588. Its totient is φ = 1028908384.

The previous prime is 1286135423. The next prime is 1286135491. The reversal of 1286135485 is 5845316821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 455139556 + 830995929 = 21334^2 + 28827^2 .

It is a cyclic number.

It is not a de Polignac number, because 1286135485 - 2²⁵ = 1252581053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128613544 + ... + 128613553.

It is an arithmetic number, because the mean of its divisors is an integer number (385840647).

Almost surely, 2^1286135485 is an apocalyptic number.

It is an amenable number.

1286135485 is a deficient number, since it is larger than the sum of its proper divisors (257227103).

1286135485 is an equidigital number, since it uses as much as digits as its factorization.

1286135485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257227102.

The product of its digits is 230400, while the sum is 43.

The square root of 1286135485 is about 35862.7311425106. The cubic root of 1286135485 is about 1087.4991017740.

The spelling of 1286135485 in words is "one billion, two hundred eighty-six million, one hundred thirty-five thousand, four hundred eighty-five".