1245775423 has 2 divisors, whose sum is σ = 1245775424. Its totient is φ = 1245775422.

The previous prime is 1245775357. The next prime is 1245775471. The reversal of 1245775423 is 3245775421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1245775423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1245775483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622887711 + 622887712.

It is an arithmetic number, because the mean of its divisors is an integer number (622887712).

Almost surely, 2^1245775423 is an apocalyptic number.

1245775423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245775423 is an equidigital number, since it uses as much as digits as its factorization.

1245775423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 235200, while the sum is 40.

The square root of 1245775423 is about 35295.5439538761. The cubic root of 1245775423 is about 1076.0024319560.

The spelling of 1245775423 in words is "one billion, two hundred forty-five million, seven hundred seventy-five thousand, four hundred twenty-three".