1254533541421 has 4 divisors (see below), whose sum is σ = 1254539118492. Its totient is φ = 1254527964352.

The previous prime is 1254533541403. The next prime is 1254533541557. The reversal of 1254533541421 is 1241453354521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28451255625 + 1226082285796 = 168675^2 + 1107286^2 .

It is a cyclic number.

It is not a de Polignac number, because 1254533541421 - 2¹⁷ = 1254533410349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1254533541721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2436286 + ... + 2905951.

It is an arithmetic number, because the mean of its divisors is an integer number (313634779623).

Almost surely, 2^{1254533541421} is an apocalyptic number.

It is an amenable number.

1254533541421 is a deficient number, since it is larger than the sum of its proper divisors (5577071).

1254533541421 is an equidigital number, since it uses as much as digits as its factorization.

1254533541421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5577070.

The product of its digits is 288000, while the sum is 40.

Adding to 1254533541421 its reverse (1241453354521), we get a palindrome (2495986895942).

The spelling of 1254533541421 in words is "one trillion, two hundred fifty-four billion, five hundred thirty-three million, five hundred forty-one thousand, four hundred twenty-one".