1131217761 has 32 divisors (see below), whose sum is σ = 1636784640. Its totient is φ = 693294336.

The previous prime is 1131217751. The next prime is 1131217771. The reversal of 1131217761 is 1677121311.

It is an interprime number because it is at equal distance from previous prime (1131217751) and next prime (1131217771).

It is not a de Polignac number, because 1131217761 - 2⁵ = 1131217729 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1131217741) 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 31 ways as a sum of consecutive naturals, for example, 147555 + ... + 155031.

It is an arithmetic number, because the mean of its divisors is an integer number (51149520).

Almost surely, 2^1131217761 is an apocalyptic number.

It is an amenable number.

1131217761 is a deficient number, since it is larger than the sum of its proper divisors (505566879).

1131217761 is a wasteful number, since it uses less digits than its factorization.

1131217761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7593.

The product of its digits is 1764, while the sum is 30.

The square root of 1131217761 is about 33633.5808530700. The cubic root of 1131217761 is about 1041.9544611037.

The spelling of 1131217761 in words is "one billion, one hundred thirty-one million, two hundred seventeen thousand, seven hundred sixty-one".