1026532561 has 4 divisors (see below), whose sum is σ = 1026618724. Its totient is φ = 1026446400.

The previous prime is 1026532547. The next prime is 1026532571. The reversal of 1026532561 is 1652356201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1252161 + 1025280400 = 1119^2 + 32020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1026532561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1026532501) 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, 21660 + ... + 50221.

It is an arithmetic number, because the mean of its divisors is an integer number (256654681).

Almost surely, 2^1026532561 is an apocalyptic number.

It is an amenable number.

1026532561 is a deficient number, since it is larger than the sum of its proper divisors (86163).

1026532561 is an equidigital number, since it uses as much as digits as its factorization.

1026532561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86162.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1026532561 is about 32039.5468288801. The cubic root of 1026532561 is about 1008.7671003327.

Adding to 1026532561 its reverse (1652356201), we get a palindrome (2678888762).

The spelling of 1026532561 in words is "one billion, twenty-six million, five hundred thirty-two thousand, five hundred sixty-one".