1267128133 has 8 divisors (see below), whose sum is σ = 1354205952. Its totient is φ = 1181443776.

The previous prime is 1267128103. The next prime is 1267128139. The reversal of 1267128133 is 3318217621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1267128133 - 2⁵ = 1267128101 is a prime.

It is a super-2 number, since 2×1267128133² = 3211227410880131378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1267128139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346485 + ... + 350122.

It is an arithmetic number, because the mean of its divisors is an integer number (169275744).

Almost surely, 2^1267128133 is an apocalyptic number.

It is an amenable number.

1267128133 is a deficient number, since it is larger than the sum of its proper divisors (87077819).

1267128133 is a wasteful number, since it uses less digits than its factorization.

1267128133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696731.

The product of its digits is 12096, while the sum is 34.

The square root of 1267128133 is about 35596.7432920485. The cubic root of 1267128133 is about 1082.1152340760.

It can be divided in two parts, 12671 and 28133, that added together give a palindrome (40804).

The spelling of 1267128133 in words is "one billion, two hundred sixty-seven million, one hundred twenty-eight thousand, one hundred thirty-three".