1273044401 has 2 divisors, whose sum is σ = 1273044402. Its totient is φ = 1273044400.

The previous prime is 1273044379. The next prime is 1273044449. The reversal of 1273044401 is 1044403721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1249269025 + 23775376 = 35345^2 + 4876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1273044401 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1273044701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636522200 + 636522201.

It is an arithmetic number, because the mean of its divisors is an integer number (636522201).

Almost surely, 2^1273044401 is an apocalyptic number.

It is an amenable number.

1273044401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1273044401 is an equidigital number, since it uses as much as digits as its factorization.

1273044401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 1273044401 is about 35679.7477709695. The cubic root of 1273044401 is about 1083.7967650581.

The spelling of 1273044401 in words is "one billion, two hundred seventy-three million, forty-four thousand, four hundred one".