1243250425 has 6 divisors (see below), whose sum is σ = 1541630558. Its totient is φ = 994600320.

The previous prime is 1243250423. The next prime is 1243250429. The reversal of 1243250425 is 5240523421.

It can be written as a sum of positive squares in 3 ways, for example, as 413349561 + 829900864 = 20331^2 + 28808^2 .

It is not a de Polignac number, because 1243250425 - 2¹ = 1243250423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1243250393 and 1243250402.

It is not an unprimeable number, because it can be changed into a prime (1243250423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24864984 + ... + 24865033.

Almost surely, 2^1243250425 is an apocalyptic number.

It is an amenable number.

1243250425 is a deficient number, since it is larger than the sum of its proper divisors (298380133).

1243250425 is an equidigital number, since it uses as much as digits as its factorization.

1243250425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49730027 (or 49730022 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 1243250425 is about 35259.7564512292. The cubic root of 1243250425 is about 1075.2749756284.

Adding to 1243250425 its reverse (5240523421), we get a palindrome (6483773846).

The spelling of 1243250425 in words is "one billion, two hundred forty-three million, two hundred fifty thousand, four hundred twenty-five".