1126320521 has 4 divisors (see below), whose sum is σ = 1127778372. Its totient is φ = 1124862672.

The previous prime is 1126320509. The next prime is 1126320523. The reversal of 1126320521 is 1250236211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1250236211 = 7 ⋅178605173.

It can be written as a sum of positive squares in 2 ways, for example, as 203376121 + 922944400 = 14261^2 + 30380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1126320521 is a prime.

It is a super-2 number, since 2×1126320521² = 2537195832051422882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1126320523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 727766 + ... + 729311.

It is an arithmetic number, because the mean of its divisors is an integer number (281944593).

Almost surely, 2^1126320521 is an apocalyptic number.

It is an amenable number.

1126320521 is a deficient number, since it is larger than the sum of its proper divisors (1457851).

1126320521 is an equidigital number, since it uses as much as digits as its factorization.

1126320521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457850.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1126320521 is about 33560.6990541020. The cubic root of 1126320521 is about 1040.4486849103.

Adding to 1126320521 its reverse (1250236211), we get a palindrome (2376556732).

The spelling of 1126320521 in words is "one billion, one hundred twenty-six million, three hundred twenty thousand, five hundred twenty-one".