1240443125 has 10 divisors (see below), whose sum is σ = 1550058510. Its totient is φ = 992354000.

The previous prime is 1240443121. The next prime is 1240443143. The reversal of 1240443125 is 5213440421.

It can be written as a sum of positive squares in 5 ways, for example, as 496353841 + 744089284 = 22279^2 + 27278^2 .

It is not a de Polignac number, because 1240443125 - 2² = 1240443121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1240443094 and 1240443103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240443121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 991730 + ... + 992979.

It is an arithmetic number, because the mean of its divisors is an integer number (155005851).

Almost surely, 2^1240443125 is an apocalyptic number.

It is an amenable number.

1240443125 is a deficient number, since it is larger than the sum of its proper divisors (309615385).

1240443125 is an frugal number, since it uses more digits than its factorization.

1240443125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984729 (or 1984714 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1240443125 is about 35219.9251134922. The cubic root of 1240443125 is about 1074.4650303753.

Adding to 1240443125 its reverse (5213440421), we get a palindrome (6453883546).

The spelling of 1240443125 in words is "one billion, two hundred forty million, four hundred forty-three thousand, one hundred twenty-five".