1286412426 has 48 divisors (see below), whose sum is σ = 3013186176. Its totient is φ = 394295328.

The previous prime is 1286412401. The next prime is 1286412443. The reversal of 1286412426 is 6242146821.

1286412426 is a `hidden beast` number, since 1 + 2 + 8 + 641 + 2 + 4 + 2 + 6 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51091 + ... + 71993.

It is an arithmetic number, because the mean of its divisors is an integer number (62774712).

Almost surely, 2^1286412426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1286412426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1506593088).

1286412426 is an abundant number, since it is smaller than the sum of its proper divisors (1726773750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1286412426 is a wasteful number, since it uses less digits than its factorization.

1286412426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21187 (or 21184 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 1286412426 is about 35866.5920600215. The cubic root of 1286412426 is about 1087.5771525128.

The spelling of 1286412426 in words is "one billion, two hundred eighty-six million, four hundred twelve thousand, four hundred twenty-six".