1125540442 has 16 divisors (see below), whose sum is σ = 1824662952. Its totient is φ = 517628160.

The previous prime is 1125540439. The next prime is 1125540457. The reversal of 1125540442 is 2440455211.

It can be written as a sum of positive squares in 4 ways, for example, as 758396521 + 367143921 = 27539^2 + 19161^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1125540442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69723 + ... + 84334.

Almost surely, 2^1125540442 is an apocalyptic number.

1125540442 is a deficient number, since it is larger than the sum of its proper divisors (699122510).

1125540442 is a wasteful number, since it uses less digits than its factorization.

1125540442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154353.

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 1125540442 is about 33549.0751288318. The cubic root of 1125540442 is about 1040.2084277772.

Adding to 1125540442 its reverse (2440455211), we get a palindrome (3565995653).

The spelling of 1125540442 in words is "one billion, one hundred twenty-five million, five hundred forty thousand, four hundred forty-two".