1240043425 has 6 divisors (see below), whose sum is σ = 1537653878. Its totient is φ = 992034720.

The previous prime is 1240043423. The next prime is 1240043447. The reversal of 1240043425 is 5243400421.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 314849536 + 925193889 = 17744^2 + 30417^2 .

It is not a de Polignac number, because 1240043425 - 2¹ = 1240043423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 49601737 = 1240043425 / (1 + 2 + 4 + 0 + 0 + 4 + 3 + 4 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1240043425.

It is not an unprimeable number, because it can be changed into a prime (1240043423) 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, 24800844 + ... + 24800893.

Almost surely, 2^1240043425 is an apocalyptic number.

It is an amenable number.

1240043425 is a deficient number, since it is larger than the sum of its proper divisors (297610453).

1240043425 is an equidigital number, since it uses as much as digits as its factorization.

1240043425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49601747 (or 49601742 counting only the distinct ones).

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

The square root of 1240043425 is about 35214.2503114861. The cubic root of 1240043425 is about 1074.3496119951.

Adding to 1240043425 its reverse (5243400421), we get a palindrome (6483443846).

The spelling of 1240043425 in words is "one billion, two hundred forty million, forty-three thousand, four hundred twenty-five".