1286268631 has 12 divisors (see below), whose sum is σ = 1379808264. Its totient is φ = 1198573200.

The previous prime is 1286268623. The next prime is 1286268649. The reversal of 1286268631 is 1368626821.

It is not a de Polignac number, because 1286268631 - 2³ = 1286268623 is a prime.

It is a super-2 number, since 2×1286268631² = 3308973982189228322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1286268691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7185 + ... + 51226.

It is an arithmetic number, because the mean of its divisors is an integer number (114984022).

Almost surely, 2^1286268631 is an apocalyptic number.

1286268631 is a deficient number, since it is larger than the sum of its proper divisors (93539633).

1286268631 is an equidigital number, since it uses as much as digits as its factorization.

1286268631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58510 (or 58491 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The square root of 1286268631 is about 35864.5874226932. The cubic root of 1286268631 is about 1087.5366279291.

The spelling of 1286268631 in words is "one billion, two hundred eighty-six million, two hundred sixty-eight thousand, six hundred thirty-one".