1242215425 has 12 divisors (see below), whose sum is σ = 1680379056. Its totient is φ = 903429200.

The previous prime is 1242215423. The next prime is 1242215549. The reversal of 1242215425 is 5245122421.

It is a happy number.

It is not a de Polignac number, because 1242215425 - 2¹ = 1242215423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1242215393 and 1242215402.

It is not an unprimeable number, because it can be changed into a prime (1242215423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2258299 + ... + 2258848.

It is an arithmetic number, because the mean of its divisors is an integer number (140031588).

Almost surely, 2^1242215425 is an apocalyptic number.

It is an amenable number.

1242215425 is a deficient number, since it is larger than the sum of its proper divisors (438163631).

1242215425 is a wasteful number, since it uses less digits than its factorization.

1242215425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4517168 (or 4517163 counting only the distinct ones).

The product of its digits is 6400, while the sum is 28.

The square root of 1242215425 is about 35245.0766065276. The cubic root of 1242215425 is about 1074.9765057061.

Adding to 1242215425 its reverse (5245122421), we get a palindrome (6487337846).

The spelling of 1242215425 in words is "one billion, two hundred forty-two million, two hundred fifteen thousand, four hundred twenty-five".