1293278426 has 16 divisors (see below), whose sum is σ = 2121199488. Its totient is φ = 586485600.

The previous prime is 1293278359. The next prime is 1293278443. The reversal of 1293278426 is 6248723921.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58715 + ... + 77678.

It is an arithmetic number, because the mean of its divisors is an integer number (132574968).

Almost surely, 2^1293278426 is an apocalyptic number.

1293278426 is a deficient number, since it is larger than the sum of its proper divisors (827921062).

1293278426 is a wasteful number, since it uses less digits than its factorization.

1293278426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136837.

The product of its digits is 290304, while the sum is 44.

The square root of 1293278426 is about 35962.1804956262. The cubic root of 1293278426 is about 1089.5086374938.

The spelling of 1293278426 in words is "one billion, two hundred ninety-three million, two hundred seventy-eight thousand, four hundred twenty-six".