1131241751 has 4 divisors (see below), whose sum is σ = 1150415400. Its totient is φ = 1112068104.

The previous prime is 1131241603. The next prime is 1131241763. The reversal of 1131241751 is 1571421311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1571421311 = 79 ⋅19891409.

It is a cyclic number.

It is not a de Polignac number, because 1131241751 - 2¹⁸ = 1130979607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131241751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131241051) 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, 9586736 + ... + 9586853.

It is an arithmetic number, because the mean of its divisors is an integer number (287603850).

Almost surely, 2^1131241751 is an apocalyptic number.

1131241751 is a deficient number, since it is larger than the sum of its proper divisors (19173649).

1131241751 is an equidigital number, since it uses as much as digits as its factorization.

1131241751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19173648.

The product of its digits is 840, while the sum is 26.

The square root of 1131241751 is about 33633.9374887925. The cubic root of 1131241751 is about 1041.9618267091.

The spelling of 1131241751 in words is "one billion, one hundred thirty-one million, two hundred forty-one thousand, seven hundred fifty-one".