1272154423 has 2 divisors, whose sum is σ = 1272154424. Its totient is φ = 1272154422.

The previous prime is 1272154399. The next prime is 1272154439. The reversal of 1272154423 is 3244512721.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1272154423 - 2⁵ = 1272154391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1272154483) by changing a digit.

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 as a sum of consecutive naturals, namely, 636077211 + 636077212.

It is an arithmetic number, because the mean of its divisors is an integer number (636077212).

Almost surely, 2^1272154423 is an apocalyptic number.

1272154423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272154423 is an equidigital number, since it uses as much as digits as its factorization.

1272154423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 31.

The square root of 1272154423 is about 35667.2738375110. The cubic root of 1272154423 is about 1083.5441474915.

The spelling of 1272154423 in words is "one billion, two hundred seventy-two million, one hundred fifty-four thousand, four hundred twenty-three".