1131505441 has 8 divisors (see below), whose sum is σ = 1276934400. Its totient is φ = 993170640.

The previous prime is 1131505439. The next prime is 1131505451. The reversal of 1131505441 is 1445051311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1131505441 - 2¹ = 1131505439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131505421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1773201 + ... + 1773838.

It is an arithmetic number, because the mean of its divisors is an integer number (159616800).

Almost surely, 2^1131505441 is an apocalyptic number.

1131505441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1131505441 is a deficient number, since it is larger than the sum of its proper divisors (145428959).

1131505441 is a wasteful number, since it uses less digits than its factorization.

1131505441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3547079.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 1131505441 is about 33637.8572593440. The cubic root of 1131505441 is about 1042.0427801004.

Adding to 1131505441 its reverse (1445051311), we get a palindrome (2576556752).

The spelling of 1131505441 in words is "one billion, one hundred thirty-one million, five hundred five thousand, four hundred forty-one".