1266133172 has 48 divisors (see below), whose sum is σ = 2367852480. Its totient is φ = 590688000.

The previous prime is 1266133163. The next prime is 1266133181. The reversal of 1266133172 is 2713316621.

It is an interprime number because it is at equal distance from previous prime (1266133163) and next prime (1266133181).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2156663 + ... + 2157249.

It is an arithmetic number, because the mean of its divisors is an integer number (49330260).

Almost surely, 2^1266133172 is an apocalyptic number.

It is an amenable number.

1266133172 is a deficient number, since it is larger than the sum of its proper divisors (1101719308).

1266133172 is a wasteful number, since it uses less digits than its factorization.

1266133172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992 (or 990 counting only the distinct ones).

The product of its digits is 9072, while the sum is 32.

The square root of 1266133172 is about 35582.7650977267. The cubic root of 1266133172 is about 1081.8319308719.

Multiplying 1266133172 by its sum of digits (32), we get a palindrome (40516261504).

Adding to 1266133172 its reverse (2713316621), we get a palindrome (3979449793).

The spelling of 1266133172 in words is "one billion, two hundred sixty-six million, one hundred thirty-three thousand, one hundred seventy-two".