1126144861 has 4 divisors (see below), whose sum is σ = 1126232800. Its totient is φ = 1126056924.

The previous prime is 1126144853. The next prime is 1126144919. The reversal of 1126144861 is 1684416211.

It is a happy number.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1684416211 = 2699 ⋅624089.

It is a cyclic number.

It is not a de Polignac number, because 1126144861 - 2³ = 1126144853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1126144841) 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, 20631 + ... + 51748.

It is an arithmetic number, because the mean of its divisors is an integer number (281558200).

Almost surely, 2^1126144861 is an apocalyptic number.

It is an amenable number.

1126144861 is a deficient number, since it is larger than the sum of its proper divisors (87939).

1126144861 is an equidigital number, since it uses as much as digits as its factorization.

1126144861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87938.

The product of its digits is 9216, while the sum is 34.

The square root of 1126144861 is about 33558.0819028740. The cubic root of 1126144861 is about 1040.3945929313.

The spelling of 1126144861 in words is "one billion, one hundred twenty-six million, one hundred forty-four thousand, eight hundred sixty-one".