1131806241 has 12 divisors (see below), whose sum is σ = 1705911168. Its totient is φ = 721731384.

The previous prime is 1131806237. The next prime is 1131806257. The reversal of 1131806241 is 1426081311.

It is a happy number.

1131806241 is a `hidden beast` number, since 1 + 1 + 31 + 8 + 0 + 624 + 1 = 666.

It is not a de Polignac number, because 1131806241 - 2² = 1131806237 is a prime.

It is a super-3 number, since 3×1131806241³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1131806141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2733625 + ... + 2734038.

It is an arithmetic number, because the mean of its divisors is an integer number (142159264).

Almost surely, 2^1131806241 is an apocalyptic number.

It is an amenable number.

1131806241 is a deficient number, since it is larger than the sum of its proper divisors (574104927).

1131806241 is a wasteful number, since it uses less digits than its factorization.

1131806241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5467692 (or 5467689 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1131806241 is about 33642.3281150398. The cubic root of 1131806241 is about 1042.1351109856.

Adding to 1131806241 its reverse (1426081311), we get a palindrome (2557887552).

The spelling of 1131806241 in words is "one billion, one hundred thirty-one million, eight hundred six thousand, two hundred forty-one".