1254534400243 has 2 divisors, whose sum is σ = 1254534400244. Its totient is φ = 1254534400242.

The previous prime is 1254534400237. The next prime is 1254534400253. The reversal of 1254534400243 is 3420044354521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1254534400243 - 2²¹ = 1254532303091 is a prime.

It is a super-2 number, since 2×1254534400243² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1254534400253) 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, 627267200121 + 627267200122.

It is an arithmetic number, because the mean of its divisors is an integer number (627267200122).

Almost surely, 2^{1254534400243} is an apocalyptic number.

1254534400243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1254534400243 is an equidigital number, since it uses as much as digits as its factorization.

1254534400243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230400, while the sum is 37.

Adding to 1254534400243 its reverse (3420044354521), we get a palindrome (4674578754764).

The spelling of 1254534400243 in words is "one trillion, two hundred fifty-four billion, five hundred thirty-four million, four hundred thousand, two hundred forty-three".