1272642323 has 4 divisors (see below), whose sum is σ = 1272934608. Its totient is φ = 1272350040.

The previous prime is 1272642317. The next prime is 1272642373. The reversal of 1272642323 is 3232462721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3232462721 = 31 ⋅104272991.

It is a cyclic number.

It is not a de Polignac number, because 1272642323 - 2⁸ = 1272642067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1272642323.

It is not an unprimeable number, because it can be changed into a prime (1272642373) 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, 139511 + ... + 148352.

It is an arithmetic number, because the mean of its divisors is an integer number (318233652).

Almost surely, 2^1272642323 is an apocalyptic number.

1272642323 is a deficient number, since it is larger than the sum of its proper divisors (292285).

1272642323 is an equidigital number, since it uses as much as digits as its factorization.

1272642323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292284.

The product of its digits is 24192, while the sum is 32.

The square root of 1272642323 is about 35674.1127850434. The cubic root of 1272642323 is about 1083.6826510174.

The spelling of 1272642323 in words is "one billion, two hundred seventy-two million, six hundred forty-two thousand, three hundred twenty-three".