1071643 has 2 divisors, whose sum is σ = 1071644. Its totient is φ = 1071642.

The previous prime is 1071641. The next prime is 1071659. The reversal of 1071643 is 3461701.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1071643 - 2¹ = 1071641 is a prime.

It is a super-2 number, since 2×1071643² = 2296837438898, which contains 22 as substring.

Together with 1071641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1071641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 535821 + 535822.

It is an arithmetic number, because the mean of its divisors is an integer number (535822).

2^1071643 is an apocalyptic number.

1071643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1071643 is an equidigital number, since it uses as much as digits as its factorization.

1071643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 1071643 is about 1035.2019126721. The cubic root of 1071643 is about 102.3332366626. Note that the first 3 decimals are identical.

The spelling of 1071643 in words is "one million, seventy-one thousand, six hundred forty-three".