1126526561 has 4 divisors (see below), whose sum is σ = 1126597824. Its totient is φ = 1126455300.

The previous prime is 1126526521. The next prime is 1126526567. The reversal of 1126526561 is 1656256211.

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: 1656256211 = 317 ⋅5224783.

It is a cyclic number.

It is not a de Polignac number, because 1126526561 - 2¹⁰ = 1126525537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1126526567) 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, 125 + ... + 47466.

It is an arithmetic number, because the mean of its divisors is an integer number (281649456).

Almost surely, 2^1126526561 is an apocalyptic number.

It is an amenable number.

1126526561 is a deficient number, since it is larger than the sum of its proper divisors (71263).

1126526561 is an equidigital number, since it uses as much as digits as its factorization.

1126526561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71262.

The product of its digits is 21600, while the sum is 35.

The square root of 1126526561 is about 33563.7685756531. The cubic root of 1126526561 is about 1040.5121248082.

The spelling of 1126526561 in words is "one billion, one hundred twenty-six million, five hundred twenty-six thousand, five hundred sixty-one".