1286248331 has 2 divisors, whose sum is σ = 1286248332. Its totient is φ = 1286248330.

The previous prime is 1286248303. The next prime is 1286248333. The reversal of 1286248331 is 1338426821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1286248331 - 2⁶ = 1286248267 is a prime.

It is a super-2 number, since 2×1286248331² = 3308869538000571122, which contains 22 as substring.

Together with 1286248333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1286248333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643124165 + 643124166.

It is an arithmetic number, because the mean of its divisors is an integer number (643124166).

Almost surely, 2^1286248331 is an apocalyptic number.

1286248331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1286248331 is an equidigital number, since it uses as much as digits as its factorization.

1286248331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 38.

The square root of 1286248331 is about 35864.3044126050. The cubic root of 1286248331 is about 1087.5309067008.

The spelling of 1286248331 in words is "one billion, two hundred eighty-six million, two hundred forty-eight thousand, three hundred thirty-one".