1272263659 has 4 divisors (see below), whose sum is σ = 1272417640. Its totient is φ = 1272109680.

The previous prime is 1272263639. The next prime is 1272263683. The reversal of 1272263659 is 9563622721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9563622721 = 971 ⋅9849251.

It is a cyclic number.

It is not a de Polignac number, because 1272263659 - 2¹⁵ = 1272230891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1272263609) 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 in 3 ways as a sum of consecutive naturals, for example, 63849 + ... + 81370.

It is an arithmetic number, because the mean of its divisors is an integer number (318104410).

Almost surely, 2^1272263659 is an apocalyptic number.

1272263659 is a deficient number, since it is larger than the sum of its proper divisors (153981).

1272263659 is an equidigital number, since it uses as much as digits as its factorization.

1272263659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153980.

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

The square root of 1272263659 is about 35668.8051243660. The cubic root of 1272263659 is about 1083.5751601418.

The spelling of 1272263659 in words is "one billion, two hundred seventy-two million, two hundred sixty-three thousand, six hundred fifty-nine".