1266878434 has 8 divisors (see below), whose sum is σ = 1946666988. Its totient is φ = 617989440.

The previous prime is 1266878429. The next prime is 1266878507. The reversal of 1266878434 is 4348786621.

It can be written as a sum of positive squares in 2 ways, for example, as 1177519225 + 89359209 = 34315^2 + 9453^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7724787 + ... + 7724950.

Almost surely, 2^1266878434 is an apocalyptic number.

1266878434 is a deficient number, since it is larger than the sum of its proper divisors (679788554).

1266878434 is a wasteful number, since it uses less digits than its factorization.

1266878434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15449780.

The product of its digits is 1548288, while the sum is 49.

The square root of 1266878434 is about 35593.2357899644. The cubic root of 1266878434 is about 1082.0441492253.

The spelling of 1266878434 in words is "one billion, two hundred sixty-six million, eight hundred seventy-eight thousand, four hundred thirty-four".