1142531441 has 4 divisors (see below), whose sum is σ = 1164088692. Its totient is φ = 1120974192.

The previous prime is 1142531407. The next prime is 1142531459. The reversal of 1142531441 is 1441352411.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 659411041 + 483120400 = 25679^2 + 21980^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142531441 - 2²⁶ = 1075422577 is a prime.

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 1142531441.

It is not an unprimeable number, because it can be changed into a prime (1142534441) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10778546 + ... + 10778651.

It is an arithmetic number, because the mean of its divisors is an integer number (291022173).

Almost surely, 2^1142531441 is an apocalyptic number.

It is an amenable number.

1142531441 is a deficient number, since it is larger than the sum of its proper divisors (21557251).

1142531441 is an equidigital number, since it uses as much as digits as its factorization.

1142531441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21557250.

The product of its digits is 1920, while the sum is 26.

The square root of 1142531441 is about 33801.3526504488. The cubic root of 1142531441 is about 1045.4165874907.

Adding to 1142531441 its reverse (1441352411), we get a palindrome (2583883852).

The spelling of 1142531441 in words is "one billion, one hundred forty-two million, five hundred thirty-one thousand, four hundred forty-one".