1065551243 has 2 divisors, whose sum is σ = 1065551244. Its totient is φ = 1065551242.

The previous prime is 1065551231. The next prime is 1065551297. The reversal of 1065551243 is 3421555601.

1065551243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1065551243 is a prime.

It is a super-2 number, since 2×1065551243² = 2270798902917690098, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1065551743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532775621 + 532775622.

It is an arithmetic number, because the mean of its divisors is an integer number (532775622).

Almost surely, 2^1065551243 is an apocalyptic number.

1065551243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1065551243 is an equidigital number, since it uses as much as digits as its factorization.

1065551243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 1065551243 is about 32642.7824028529. The cubic root of 1065551243 is about 1021.3896357774.

The spelling of 1065551243 in words is "one billion, sixty-five million, five hundred fifty-one thousand, two hundred forty-three".