1326250553 has 4 divisors (see below), whose sum is σ = 1326361728. Its totient is φ = 1326139380.

The previous prime is 1326250537. The next prime is 1326250561. The reversal of 1326250553 is 3550526231.

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.

It is a cyclic number.

It is not a de Polignac number, because 1326250553 - 2⁴ = 1326250537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1326250573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35201 + ... + 62382.

It is an arithmetic number, because the mean of its divisors is an integer number (331590432).

Almost surely, 2^1326250553 is an apocalyptic number.

It is an amenable number.

1326250553 is a deficient number, since it is larger than the sum of its proper divisors (111175).

1326250553 is an equidigital number, since it uses as much as digits as its factorization.

1326250553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111174.

The product of its (nonzero) digits is 27000, while the sum is 32.

The square root of 1326250553 is about 36417.7230617182. The cubic root of 1326250553 is about 1098.6900530514.

Adding to 1326250553 its reverse (3550526231), we get a palindrome (4876776784).

The spelling of 1326250553 in words is "one billion, three hundred twenty-six million, two hundred fifty thousand, five hundred fifty-three".