1266091292 has 6 divisors (see below), whose sum is σ = 2215659768. Its totient is φ = 633045644.

The previous prime is 1266091291. The next prime is 1266091301. The reversal of 1266091292 is 2921906621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266091291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158261408 + ... + 158261415.

It is an arithmetic number, because the mean of its divisors is an integer number (369276628).

Almost surely, 2^1266091292 is an apocalyptic number.

It is an amenable number.

1266091292 is a deficient number, since it is larger than the sum of its proper divisors (949568476).

1266091292 is a wasteful number, since it uses less digits than its factorization.

1266091292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316522827 (or 316522825 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 1266091292 is about 35582.1766057109. The cubic root of 1266091292 is about 1081.8200027899.

It can be divided in two parts, 126609 and 1292, that multiplied together give a triangular number (163578828 = T₁₈₀₈₇).

The spelling of 1266091292 in words is "one billion, two hundred sixty-six million, ninety-one thousand, two hundred ninety-two".