1131560549 has 4 divisors (see below), whose sum is σ = 1293212064. Its totient is φ = 969909036.

The previous prime is 1131560537. The next prime is 1131560567. The reversal of 1131560549 is 9450651311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9450651311 = 10853 ⋅870787.

It is a cyclic number.

It is not a de Polignac number, because 1131560549 - 2⁴ = 1131560533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131560149) 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, 80825747 + ... + 80825760.

It is an arithmetic number, because the mean of its divisors is an integer number (323303016).

Almost surely, 2^1131560549 is an apocalyptic number.

It is an amenable number.

1131560549 is a deficient number, since it is larger than the sum of its proper divisors (161651515).

1131560549 is an equidigital number, since it uses as much as digits as its factorization.

1131560549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161651514.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 1131560549 is about 33638.6763859698. The cubic root of 1131560549 is about 1042.0596967848.

The spelling of 1131560549 in words is "one billion, one hundred thirty-one million, five hundred sixty thousand, five hundred forty-nine".