1243040125 has 16 divisors (see below), whose sum is σ = 1559913264. Its totient is φ = 988920000.

The previous prime is 1243040081. The next prime is 1243040147. The reversal of 1243040125 is 5210403421.

It can be written as a sum of positive squares in 8 ways, for example, as 599809081 + 643231044 = 24491^2 + 25362^2 .

It is not a de Polignac number, because 1243040125 - 2⁷ = 1243039997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1243040096 and 1243040105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4846 + ... + 50095.

It is an arithmetic number, because the mean of its divisors is an integer number (97494579).

Almost surely, 2^1243040125 is an apocalyptic number.

It is an amenable number.

1243040125 is a deficient number, since it is larger than the sum of its proper divisors (316873139).

1243040125 is an equidigital number, since it uses as much as digits as its factorization.

1243040125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55137 (or 55127 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1243040125 is about 35256.7741717815. The cubic root of 1243040125 is about 1075.2143434141.

Adding to 1243040125 its reverse (5210403421), we get a palindrome (6453443546).

The spelling of 1243040125 in words is "one billion, two hundred forty-three million, forty thousand, one hundred twenty-five".