1105265521 has 2 divisors, whose sum is σ = 1105265522. Its totient is φ = 1105265520.

The previous prime is 1105265519. The next prime is 1105265531. The reversal of 1105265521 is 1255625011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1091575521 + 13690000 = 33039^2 + 3700^2 .

It is a cyclic number.

It is not a de Polignac number, because 1105265521 - 2¹ = 1105265519 is a prime.

It is a super-2 number, since 2×1105265521² = 2443223743822802882, which contains 22 as substring.

Together with 1105265519, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1105265521.

It is not a weakly prime, because it can be changed into another prime (1105265501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552632760 + 552632761.

It is an arithmetic number, because the mean of its divisors is an integer number (552632761).

Almost surely, 2^1105265521 is an apocalyptic number.

It is an amenable number.

1105265521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105265521 is an equidigital number, since it uses as much as digits as its factorization.

1105265521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 28.

The square root of 1105265521 is about 33245.5338504287. The cubic root of 1105265521 is about 1033.9246132374.

The spelling of 1105265521 in words is "one billion, one hundred five million, two hundred sixty-five thousand, five hundred twenty-one".