1151445521 has 2 divisors, whose sum is σ = 1151445522. Its totient is φ = 1151445520.

The previous prime is 1151445499. The next prime is 1151445541. The reversal of 1151445521 is 1255441511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 796650625 + 354794896 = 28225^2 + 18836^2 .

It is a cyclic number.

It is not a de Polignac number, because 1151445521 - 2¹⁸ = 1151183377 is a prime.

It is a super-3 number, since 3×1151445521³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1151445541) 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 as a sum of consecutive naturals, namely, 575722760 + 575722761.

It is an arithmetic number, because the mean of its divisors is an integer number (575722761).

Almost surely, 2^1151445521 is an apocalyptic number.

It is an amenable number.

1151445521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151445521 is an equidigital number, since it uses as much as digits as its factorization.

1151445521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4000, while the sum is 29.

The square root of 1151445521 is about 33932.9562667328. The cubic root of 1151445521 is about 1048.1283424900.

The spelling of 1151445521 in words is "one billion, one hundred fifty-one million, four hundred forty-five thousand, five hundred twenty-one".