1205251423 has 2 divisors, whose sum is σ = 1205251424. Its totient is φ = 1205251422.

The previous prime is 1205251381. The next prime is 1205251471. The reversal of 1205251423 is 3241525021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1205251423 - 2⁹ = 1205250911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205251493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602625711 + 602625712.

It is an arithmetic number, because the mean of its divisors is an integer number (602625712).

Almost surely, 2^1205251423 is an apocalyptic number.

1205251423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205251423 is an equidigital number, since it uses as much as digits as its factorization.

1205251423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1205251423 is about 34716.7311681270. The cubic root of 1205251423 is about 1064.2064439032.

Adding to 1205251423 its reverse (3241525021), we get a palindrome (4446776444).

The spelling of 1205251423 in words is "one billion, two hundred five million, two hundred fifty-one thousand, four hundred twenty-three".