1243430125 has 48 divisors (see below), whose sum is σ = 1826238960. Its totient is φ = 842688000.

The previous prime is 1243430081. The next prime is 1243430137. The reversal of 1243430125 is 5210343421.

1243430125 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 541074121 + 702356004 = 23261^2 + 26502^2 .

It is not a de Polignac number, because 1243430125 - 2¹⁹ = 1242905837 is a prime.

It is a super-2 number, since 2×1243430125² = 3092236951515031250, which contains 22 as substring.

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 1243430125.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 543985 + ... + 546265.

It is an arithmetic number, because the mean of its divisors is an integer number (38046645).

Almost surely, 2^1243430125 is an apocalyptic number.

It is an amenable number.

1243430125 is a deficient number, since it is larger than the sum of its proper divisors (582808835).

1243430125 is an equidigital number, since it uses as much as digits as its factorization.

1243430125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2399 (or 2382 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 1243430125 is about 35262.3045900293. The cubic root of 1243430125 is about 1075.3267800491.

Adding to 1243430125 its reverse (5210343421), we get a palindrome (6453773546).

The spelling of 1243430125 in words is "one billion, two hundred forty-three million, four hundred thirty thousand, one hundred twenty-five".