1266381141 has 12 divisors (see below), whose sum is σ = 1782055872. Its totient is φ = 799818984.

The previous prime is 1266381101. The next prime is 1266381157. The reversal of 1266381141 is 1411836621.

It is not a de Polignac number, because 1266381141 - 2¹⁵ = 1266348373 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266381101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 583581 + ... + 585746.

It is an arithmetic number, because the mean of its divisors is an integer number (148504656).

Almost surely, 2^1266381141 is an apocalyptic number.

It is an amenable number.

1266381141 is a deficient number, since it is larger than the sum of its proper divisors (515674731).

1266381141 is a wasteful number, since it uses less digits than its factorization.

1266381141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169368 (or 1169349 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 1266381141 is about 35586.2493247041. The cubic root of 1266381141 is about 1081.9025509502.

The spelling of 1266381141 in words is "one billion, two hundred sixty-six million, three hundred eighty-one thousand, one hundred forty-one".