1105719521 has 2 divisors, whose sum is σ = 1105719522. Its totient is φ = 1105719520.

The previous prime is 1105719499. The next prime is 1105719541. The reversal of 1105719521 is 1259175011.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1058591296 + 47128225 = 32536^2 + 6865^2 .

It is a cyclic number.

It is not a de Polignac number, because 1105719521 - 2¹⁸ = 1105457377 is a prime.

It is not a weakly prime, because it can be changed into another prime (1105719541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552859760 + 552859761.

It is an arithmetic number, because the mean of its divisors is an integer number (552859761).

Almost surely, 2^1105719521 is an apocalyptic number.

It is an amenable number.

1105719521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105719521 is an equidigital number, since it uses as much as digits as its factorization.

1105719521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3150, while the sum is 32.

The square root of 1105719521 is about 33252.3611342112. The cubic root of 1105719521 is about 1034.0661591705.

The spelling of 1105719521 in words is "one billion, one hundred five million, seven hundred nineteen thousand, five hundred twenty-one".