1065121553 has 8 divisors (see below), whose sum is σ = 1158256872. Its totient is φ = 975373056.

The previous prime is 1065121543. The next prime is 1065121571. The reversal of 1065121553 is 3551215601.

It can be written as a sum of positive squares in 4 ways, for example, as 681627664 + 383493889 = 26108^2 + 19583^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1065121553 - 2⁸ = 1065121297 is a prime.

It is a super-2 number, since 2×1065121553² = 2268967845330263618, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1065121523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 846050 + ... + 847307.

It is an arithmetic number, because the mean of its divisors is an integer number (144782109).

Almost surely, 2^1065121553 is an apocalyptic number.

It is an amenable number.

1065121553 is a deficient number, since it is larger than the sum of its proper divisors (93135319).

1065121553 is a wasteful number, since it uses less digits than its factorization.

1065121553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693411.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 1065121553 is about 32636.2000392203. The cubic root of 1065121553 is about 1021.2523234637.

The spelling of 1065121553 in words is "one billion, sixty-five million, one hundred twenty-one thousand, five hundred fifty-three".