1798001 has 2 divisors, whose sum is σ = 1798002. Its totient is φ = 1798000.

The previous prime is 1797967. The next prime is 1798003. The reversal of 1798001 is 1008971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1795600 + 2401 = 1340^2 + 49^2 .

It is a cyclic number.

It is not a de Polignac number, because 1798001 - 2¹⁸ = 1535857 is a prime.

It is a Sophie Germain prime.

Together with 1798003, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1798003) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899000 + 899001.

It is an arithmetic number, because the mean of its divisors is an integer number (899001).

2^1798001 is an apocalyptic number.

It is an amenable number.

1798001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1798001 is an equidigital number, since it uses as much as digits as its factorization.

1798001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 1798001 is about 1340.8955962341. The cubic root of 1798001 is about 121.5989924100.

The spelling of 1798001 in words is "one million, seven hundred ninety-eight thousand, one".