1272235966 has 4 divisors (see below), whose sum is σ = 1908353952. Its totient is φ = 636117982.

The previous prime is 1272235963. The next prime is 1272235973. The reversal of 1272235966 is 6695322721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6695322721 = 17 ⋅393842513.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272235963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318058990 + ... + 318058993.

It is an arithmetic number, because the mean of its divisors is an integer number (477088488).

Almost surely, 2^1272235966 is an apocalyptic number.

1272235966 is a deficient number, since it is larger than the sum of its proper divisors (636117986).

1272235966 is an equidigital number, since it uses as much as digits as its factorization.

1272235966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636117985.

The product of its digits is 272160, while the sum is 43.

The square root of 1272235966 is about 35668.4169259024. The cubic root of 1272235966 is about 1083.5672981277.

The spelling of 1272235966 in words is "one billion, two hundred seventy-two million, two hundred thirty-five thousand, nine hundred sixty-six".