1272405973 has 2 divisors, whose sum is σ = 1272405974. Its totient is φ = 1272405972.

The previous prime is 1272405887. The next prime is 1272405989. The reversal of 1272405973 is 3795042721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 814360369 + 458045604 = 28537^2 + 21402^2 .

It is a cyclic number.

It is not a de Polignac number, because 1272405973 - 2⁹ = 1272405461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1272405473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636202986 + 636202987.

It is an arithmetic number, because the mean of its divisors is an integer number (636202987).

Almost surely, 2^1272405973 is an apocalyptic number.

It is an amenable number.

1272405973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272405973 is an equidigital number, since it uses as much as digits as its factorization.

1272405973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 1272405973 is about 35670.8000050461. The cubic root of 1272405973 is about 1083.6155611401.

The spelling of 1272405973 in words is "one billion, two hundred seventy-two million, four hundred five thousand, nine hundred seventy-three".