12454400225 has 6 divisors (see below), whose sum is σ = 15443456310. Its totient is φ = 9963520160.

The previous prime is 12454400201. The next prime is 12454400239. The reversal of 12454400225 is 52200445421.

It can be written as a sum of positive squares in 3 ways, for example, as 362978704 + 12091421521 = 19052^2 + 109961^2 .

It is not a de Polignac number, because 12454400225 - 2¹⁴ = 12454383841 is a prime.

It is a super-2 number, since 2×12454400225² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 249087980 + ... + 249088029.

It is an arithmetic number, because the mean of its divisors is an integer number (2573909385).

Almost surely, 2^12454400225 is an apocalyptic number.

It is an amenable number.

12454400225 is a deficient number, since it is larger than the sum of its proper divisors (2989056085).

12454400225 is an equidigital number, since it uses as much as digits as its factorization.

12454400225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498176019 (or 498176014 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

Adding to 12454400225 its reverse (52200445421), we get a palindrome (64654845646).

The spelling of 12454400225 in words is "twelve billion, four hundred fifty-four million, four hundred thousand, two hundred twenty-five".