1245402112225 has 6 divisors (see below), whose sum is σ = 1544298619190. Its totient is φ = 996321689760.

The previous prime is 1245402112223. The next prime is 1245402112231. The reversal of 1245402112225 is 5222112045421.

It can be written as a sum of positive squares in 3 ways, for example, as 3282946209 + 1242119166016 = 57297^2 + 1114504^2 .

It is not a de Polignac number, because 1245402112225 - 2¹ = 1245402112223 is a prime.

It is a super-2 number, since 2×1245402112225² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1245402112223) 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 in 5 ways as a sum of consecutive naturals, for example, 24908042220 + ... + 24908042269.

Almost surely, 2^{1245402112225} is an apocalyptic number.

It is an amenable number.

1245402112225 is a deficient number, since it is larger than the sum of its proper divisors (298896506965).

1245402112225 is an equidigital number, since it uses as much as digits as its factorization.

1245402112225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49816084499 (or 49816084494 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 31.

Adding to 1245402112225 its reverse (5222112045421), we get a palindrome (6467514157646).

The spelling of 1245402112225 in words is "one trillion, two hundred forty-five billion, four hundred two million, one hundred twelve thousand, two hundred twenty-five".