1286311427 has 4 divisors (see below), whose sum is σ = 1327805376. Its totient is φ = 1244817480.

The previous prime is 1286311399. The next prime is 1286311441. The reversal of 1286311427 is 7241136821.

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

It is a cyclic number.

It is not a de Polignac number, because 1286311427 - 2²⁶ = 1219202563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1286311447) 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, 20746928 + ... + 20746989.

It is an arithmetic number, because the mean of its divisors is an integer number (331951344).

Almost surely, 2^1286311427 is an apocalyptic number.

1286311427 is a deficient number, since it is larger than the sum of its proper divisors (41493949).

1286311427 is an equidigital number, since it uses as much as digits as its factorization.

1286311427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41493948.

The product of its digits is 16128, while the sum is 35.

The square root of 1286311427 is about 35865.1840508312. The cubic root of 1286311427 is about 1087.5486890959.

The spelling of 1286311427 in words is "one billion, two hundred eighty-six million, three hundred eleven thousand, four hundred twenty-seven".