1131203441 has 4 divisors (see below), whose sum is σ = 1134236532. Its totient is φ = 1128170352.

The previous prime is 1131203429. The next prime is 1131203461. The reversal of 1131203441 is 1443021311.

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 667705600 + 463497841 = 25840^2 + 21529^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131203441 - 2²² = 1127009137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131203461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1515986 + ... + 1516731.

It is an arithmetic number, because the mean of its divisors is an integer number (283559133).

Almost surely, 2^1131203441 is an apocalyptic number.

It is an amenable number.

1131203441 is a deficient number, since it is larger than the sum of its proper divisors (3033091).

1131203441 is an equidigital number, since it uses as much as digits as its factorization.

1131203441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3033090.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1131203441 is about 33633.3679699194. The cubic root of 1131203441 is about 1041.9500644109.

Adding to 1131203441 its reverse (1443021311), we get a palindrome (2574224752).

The spelling of 1131203441 in words is "one billion, one hundred thirty-one million, two hundred three thousand, four hundred forty-one".