1256452123 has 2 divisors, whose sum is σ = 1256452124. Its totient is φ = 1256452122.

The previous prime is 1256452069. The next prime is 1256452151. The reversal of 1256452123 is 3212546521.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1256452123 is a prime.

It is not a weakly prime, because it can be changed into another prime (1256453123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628226061 + 628226062.

It is an arithmetic number, because the mean of its divisors is an integer number (628226062).

Almost surely, 2^1256452123 is an apocalyptic number.

1256452123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256452123 is an equidigital number, since it uses as much as digits as its factorization.

1256452123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 31.

The square root of 1256452123 is about 35446.4684136516. The cubic root of 1256452123 is about 1079.0675888733.

Adding to 1256452123 its reverse (3212546521), we get a palindrome (4468998644).

The spelling of 1256452123 in words is "one billion, two hundred fifty-six million, four hundred fifty-two thousand, one hundred twenty-three".