1800361 has 2 divisors, whose sum is σ = 1800362. Its totient is φ = 1800360.

The previous prime is 1800343. The next prime is 1800377. The reversal of 1800361 is 1630081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1795600 + 4761 = 1340^2 + 69^2 .

It is a cyclic number.

It is not a de Polignac number, because 1800361 - 2⁹ = 1799849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1800301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 900180 + 900181.

It is an arithmetic number, because the mean of its divisors is an integer number (900181).

2^1800361 is an apocalyptic number.

It is an amenable number.

1800361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1800361 is an equidigital number, since it uses as much as digits as its factorization.

1800361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1800361 is about 1341.7753165117. The cubic root of 1800361 is about 121.6521714972.

The spelling of 1800361 in words is "one million, eight hundred thousand, three hundred sixty-one".