1266878459 has 8 divisors (see below), whose sum is σ = 1579484928. Its totient is φ = 987177960.

The previous prime is 1266878429. The next prime is 1266878507. The reversal of 1266878459 is 9548786621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1266878459 - 2¹² = 1266874363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1266878419) by changing a digit.

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, 8226407 + ... + 8226560.

It is an arithmetic number, because the mean of its divisors is an integer number (197435616).

Almost surely, 2^1266878459 is an apocalyptic number.

1266878459 is a deficient number, since it is larger than the sum of its proper divisors (312606469).

1266878459 is a wasteful number, since it uses less digits than its factorization.

1266878459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16452985.

The product of its digits is 5806080, while the sum is 56.

The square root of 1266878459 is about 35593.2361411547. The cubic root of 1266878459 is about 1082.0441563428.

The spelling of 1266878459 in words is "one billion, two hundred sixty-six million, eight hundred seventy-eight thousand, four hundred fifty-nine".