1272772123 has 8 divisors (see below), whose sum is σ = 1458993920. Its totient is φ = 1087649640.

The previous prime is 1272772121. The next prime is 1272772129. The reversal of 1272772123 is 3212772721.

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

It is not a de Polignac number, because 1272772123 - 2¹ = 1272772121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1272772121) 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 7 ways as a sum of consecutive naturals, for example, 272343 + ... + 276976.

It is an arithmetic number, because the mean of its divisors is an integer number (182374240).

Almost surely, 2^1272772123 is an apocalyptic number.

1272772123 is a deficient number, since it is larger than the sum of its proper divisors (186221797).

1272772123 is an equidigital number, since it uses as much as digits as its factorization.

1272772123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549657.

The product of its digits is 16464, while the sum is 34.

The square root of 1272772123 is about 35675.9319850232. The cubic root of 1272772123 is about 1083.7194922738.

The spelling of 1272772123 in words is "one billion, two hundred seventy-two million, seven hundred seventy-two thousand, one hundred twenty-three".