1242065225 has 12 divisors (see below), whose sum is σ = 1565411340. Its totient is φ = 977361600.

The previous prime is 1242065197. The next prime is 1242065233. The reversal of 1242065225 is 5225602421.

It can be written as a sum of positive squares in 6 ways, for example, as 217297081 + 1024768144 = 14741^2 + 32012^2 .

It is not a de Polignac number, because 1242065225 - 2¹⁸ = 1241803081 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 405710 + ... + 408759.

It is an arithmetic number, because the mean of its divisors is an integer number (130450945).

Almost surely, 2^1242065225 is an apocalyptic number.

It is an amenable number.

1242065225 is a deficient number, since it is larger than the sum of its proper divisors (323346115).

1242065225 is an equidigital number, since it uses as much as digits as its factorization.

1242065225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814540 (or 814535 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 1242065225 is about 35242.9457480501. The cubic root of 1242065225 is about 1074.9331777465.

Adding to 1242065225 its reverse (5225602421), we get a palindrome (6467667646).

The spelling of 1242065225 in words is "one billion, two hundred forty-two million, sixty-five thousand, two hundred twenty-five".