1352843021 has 2 divisors, whose sum is σ = 1352843022. Its totient is φ = 1352843020.

The previous prime is 1352842991. The next prime is 1352843071. The reversal of 1352843021 is 1203482531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1063672996 + 289170025 = 32614^2 + 17005^2 .

It is a cyclic number.

It is not a de Polignac number, because 1352843021 - 2¹⁴ = 1352826637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1352843071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 676421510 + 676421511.

It is an arithmetic number, because the mean of its divisors is an integer number (676421511).

Almost surely, 2^1352843021 is an apocalyptic number.

It is an amenable number.

1352843021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1352843021 is an equidigital number, since it uses as much as digits as its factorization.

1352843021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 1352843021 is about 36781.0144096108. The cubic root of 1352843021 is about 1105.9847410822.

The spelling of 1352843021 in words is "one billion, three hundred fifty-two million, eight hundred forty-three thousand, twenty-one".