1279385133 has 16 divisors (see below), whose sum is σ = 1945129536. Its totient is φ = 741000960.

The previous prime is 1279385131. The next prime is 1279385161. The reversal of 1279385133 is 3315839721.

It is not a de Polignac number, because 1279385133 - 2¹ = 1279385131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279385131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 964183 + ... + 965508.

It is an arithmetic number, because the mean of its divisors is an integer number (121570596).

Almost surely, 2^1279385133 is an apocalyptic number.

1279385133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1279385133 is a deficient number, since it is larger than the sum of its proper divisors (665744403).

1279385133 is a wasteful number, since it uses less digits than its factorization.

1279385133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929724.

The product of its digits is 136080, while the sum is 42.

The square root of 1279385133 is about 35768.4935802446. The cubic root of 1279385133 is about 1085.5931640201.

The spelling of 1279385133 in words is "one billion, two hundred seventy-nine million, three hundred eighty-five thousand, one hundred thirty-three".