1269746985 has 16 divisors (see below), whose sum is σ = 2187872064. Its totient is φ = 625106112.

The previous prime is 1269746977. The next prime is 1269747079. The reversal of 1269746985 is 5896479621.

It is not a de Polignac number, because 1269746985 - 2³ = 1269746977 is a prime.

It is a super-2 number, since 2×1269746985² = 3224514811833180450, which contains 22 as substring.

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, 3255567 + ... + 3255956.

It is an arithmetic number, because the mean of its divisors is an integer number (136742004).

Almost surely, 2^1269746985 is an apocalyptic number.

1269746985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1269746985 is a deficient number, since it is larger than the sum of its proper divisors (918125079).

1269746985 is a wasteful number, since it uses less digits than its factorization.

1269746985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6511544.

The product of its digits is 6531840, while the sum is 57.

The square root of 1269746985 is about 35633.5092995343. The cubic root of 1269746985 is about 1082.8602125508.

The spelling of 1269746985 in words is "one billion, two hundred sixty-nine million, seven hundred forty-six thousand, nine hundred eighty-five".