1600121 has 2 divisors, whose sum is σ = 1600122. Its totient is φ = 1600120.

The previous prime is 1600099. The next prime is 1600141. The reversal of 1600121 is 1210061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1590121 + 10000 = 1261^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 1600121 - 2¹⁸ = 1337977 is a prime.

It is not a weakly prime, because it can be changed into another prime (1600141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800060 + 800061.

It is an arithmetic number, because the mean of its divisors is an integer number (800061).

2^1600121 is an apocalyptic number.

It is an amenable number.

1600121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1600121 is an equidigital number, since it uses as much as digits as its factorization.

1600121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1600121 is about 1264.9588926127. The cubic root of 1600121 is about 116.9636578387.

Adding to 1600121 its reverse (1210061), we get a palindrome (2810182).

It can be divided in two parts, 1600 and 121, that multiplied together give a square (193600 = 440²).

The spelling of 1600121 in words is "one million, six hundred thousand, one hundred twenty-one".