1267378705 has 16 divisors (see below), whose sum is σ = 1552478400. Its totient is φ = 992950720.

The previous prime is 1267378699. The next prime is 1267378711. The reversal of 1267378705 is 5078737621.

1267378705 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1267378699) and next prime (1267378711).

It is not a de Polignac number, because 1267378705 - 2¹¹ = 1267376657 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 71370 + ... + 87340.

It is an arithmetic number, because the mean of its divisors is an integer number (97029900).

Almost surely, 2^1267378705 is an apocalyptic number.

It is an amenable number.

1267378705 is a deficient number, since it is larger than the sum of its proper divisors (285099695).

1267378705 is a wasteful number, since it uses less digits than its factorization.

1267378705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16304.

The product of its (nonzero) digits is 493920, while the sum is 46.

The square root of 1267378705 is about 35600.2627097048. The cubic root of 1267378705 is about 1082.1865580672.

It can be divided in two parts, 12673 and 78705, that added together give a triangular number (91378 = T₄₂₇).

The spelling of 1267378705 in words is "one billion, two hundred sixty-seven million, three hundred seventy-eight thousand, seven hundred five".