1600321 has 2 divisors, whose sum is σ = 1600322. Its totient is φ = 1600320.

The previous prime is 1600283. The next prime is 1600337. The reversal of 1600321 is 1230061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 810000 + 790321 = 900^2 + 889^2 .

It is a cyclic number.

It is not a de Polignac number, because 1600321 - 2⁹ = 1599809 is a prime.

It is a super-2 number, since 2×1600321² = 5122054606082, which contains 22 as substring.

It is equal to p₁₂₁₁₅₃ and since 1600321 and 121153 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1600121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800160 + 800161.

It is an arithmetic number, because the mean of its divisors is an integer number (800161).

2^1600321 is an apocalyptic number.

It is an amenable number.

1600321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1600321 is an equidigital number, since it uses as much as digits as its factorization.

1600321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1600321 is about 1265.0379440950. The cubic root of 1600321 is about 116.9685307529.

Adding to 1600321 its reverse (1230061), we get a palindrome (2830382).

The spelling of 1600321 in words is "one million, six hundred thousand, three hundred twenty-one".