1253555473 has 2 divisors, whose sum is σ = 1253555474. Its totient is φ = 1253555472.

The previous prime is 1253555399. The next prime is 1253555483. The reversal of 1253555473 is 3745553521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 785568784 + 467986689 = 28028^2 + 21633^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1253555473 is a prime.

It is not a weakly prime, because it can be changed into another prime (1253555483) 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, 626777736 + 626777737.

It is an arithmetic number, because the mean of its divisors is an integer number (626777737).

Almost surely, 2^1253555473 is an apocalyptic number.

It is an amenable number.

1253555473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1253555473 is an equidigital number, since it uses as much as digits as its factorization.

1253555473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 315000, while the sum is 40.

The square root of 1253555473 is about 35405.5853362150. The cubic root of 1253555473 is about 1078.2377161022.

The spelling of 1253555473 in words is "one billion, two hundred fifty-three million, five hundred fifty-five thousand, four hundred seventy-three".