1243202425 has 12 divisors (see below), whose sum is σ = 1545018300. Its totient is φ = 992337920.

The previous prime is 1243202423. The next prime is 1243202437. The reversal of 1243202425 is 5242023421.

It can be written as a sum of positive squares in 6 ways, for example, as 68906601 + 1174295824 = 8301^2 + 34268^2 .

It is not a de Polignac number, because 1243202425 - 2¹ = 1243202423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 1243202425.

It is not an unprimeable number, because it can be changed into a prime (1243202423) 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, 44152 + ... + 66601.

It is an arithmetic number, because the mean of its divisors is an integer number (128751525).

Almost surely, 2^1243202425 is an apocalyptic number.

It is an amenable number.

1243202425 is a deficient number, since it is larger than the sum of its proper divisors (301815875).

1243202425 is a wasteful number, since it uses less digits than its factorization.

1243202425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111212 (or 111207 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 1243202425 is about 35259.0757819884. The cubic root of 1243202425 is about 1075.2611372088.

Adding to 1243202425 its reverse (5242023421), we get a palindrome (6485225846).

The spelling of 1243202425 in words is "one billion, two hundred forty-three million, two hundred two thousand, four hundred twenty-five".