1043521252009 has 2 divisors, whose sum is σ = 1043521252010. Its totient is φ = 1043521252008.

The previous prime is 1043521251977. The next prime is 1043521252019. The reversal of 1043521252009 is 9002521253401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 547003722409 + 496517529600 = 739597^2 + 704640^2 .

It is a cyclic number.

It is not a de Polignac number, because 1043521252009 - 2⁵ = 1043521251977 is a prime.

It is not a weakly prime, because it can be changed into another prime (1043521252019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521760626004 + 521760626005.

It is an arithmetic number, because the mean of its divisors is an integer number (521760626005).

Almost surely, 2^{1043521252009} is an apocalyptic number.

It is an amenable number.

1043521252009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1043521252009 is an equidigital number, since it uses as much as digits as its factorization.

1043521252009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 1043521252009 in words is "one trillion, forty-three billion, five hundred twenty-one million, two hundred fifty-two thousand, nine".