1256454523 has 2 divisors, whose sum is σ = 1256454524. Its totient is φ = 1256454522.

The previous prime is 1256454509. The next prime is 1256454533. The reversal of 1256454523 is 3254546521.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1256454523 is a prime.

It is not a weakly prime, because it can be changed into another prime (1256454533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628227261 + 628227262.

It is an arithmetic number, because the mean of its divisors is an integer number (628227262).

Almost surely, 2^1256454523 is an apocalyptic number.

1256454523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256454523 is an equidigital number, since it uses as much as digits as its factorization.

1256454523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144000, while the sum is 37.

The square root of 1256454523 is about 35446.5022675017. The cubic root of 1256454523 is about 1079.0682759297.

The spelling of 1256454523 in words is "one billion, two hundred fifty-six million, four hundred fifty-four thousand, five hundred twenty-three".