1266941853 has 6 divisors (see below), whose sum is σ = 1830027134. Its totient is φ = 844627896.

The previous prime is 1266941843. The next prime is 1266941903. The reversal of 1266941853 is 3581496621.

1266941853 is a `hidden beast` number, since 126 + 69 + 418 + 53 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1026753849 + 240188004 = 32043^2 + 15498^2 .

It is not a de Polignac number, because 1266941853 - 2⁸ = 1266941597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1266941799 and 1266941808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266941833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70385650 + ... + 70385667.

Almost surely, 2^1266941853 is an apocalyptic number.

It is an amenable number.

1266941853 is a deficient number, since it is larger than the sum of its proper divisors (563085281).

1266941853 is a wasteful number, since it uses less digits than its factorization.

1266941853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140771323 (or 140771320 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 1266941853 is about 35594.1266643810. The cubic root of 1266941853 is about 1082.0622043680.

The spelling of 1266941853 in words is "one billion, two hundred sixty-six million, nine hundred forty-one thousand, eight hundred fifty-three".