1601443 has 2 divisors, whose sum is σ = 1601444. Its totient is φ = 1601442.

The previous prime is 1601441. The next prime is 1601447. The reversal of 1601443 is 3441061.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1601443 - 2¹ = 1601441 is a prime.

Together with 1601441, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1601443.

It is not a weakly prime, because it can be changed into another prime (1601441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800721 + 800722.

It is an arithmetic number, because the mean of its divisors is an integer number (800722).

2^1601443 is an apocalyptic number.

1601443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601443 is an equidigital number, since it uses as much as digits as its factorization.

1601443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1601443 is about 1265.4813313518. The cubic root of 1601443 is about 116.9958602767.

Subtracting from 1601443 its product of nonzero digits (288), we obtain a triangular number (1601155 = T₁₇₈₉).

The spelling of 1601443 in words is "one million, six hundred one thousand, four hundred forty-three".