1302121 has 2 divisors, whose sum is σ = 1302122. Its totient is φ = 1302120.

The previous prime is 1302107. The next prime is 1302137. The reversal of 1302121 is 1212031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1125721 + 176400 = 1061^2 + 420^2 .

It is a cyclic number.

It is not a de Polignac number, because 1302121 - 2¹¹ = 1300073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1302098 and 1302107.

It is not a weakly prime, because it can be changed into another prime (1302151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651060 + 651061.

It is an arithmetic number, because the mean of its divisors is an integer number (651061).

2^1302121 is an apocalyptic number.

It is an amenable number.

1302121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1302121 is an equidigital number, since it uses as much as digits as its factorization.

1302121 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 10.

The square root of 1302121 is about 1141.1051660561. The cubic root of 1302121 is about 109.1986110375.

Adding to 1302121 its reverse (1212031), we get a palindrome (2514152).

The spelling of 1302121 in words is "one million, three hundred two thousand, one hundred twenty-one".