1305121 has 2 divisors, whose sum is σ = 1305122. Its totient is φ = 1305120.

The previous prime is 1305097. The next prime is 1305137. The reversal of 1305121 is 1215031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 876096 + 429025 = 936^2 + 655^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305121 - 2⁹ = 1304609 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1305151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652560 + 652561.

It is an arithmetic number, because the mean of its divisors is an integer number (652561).

2^1305121 is an apocalyptic number.

It is an amenable number.

1305121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305121 is an equidigital number, since it uses as much as digits as its factorization.

1305121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 1305121 is about 1142.4189249133. The cubic root of 1305121 is about 109.2824088229.

The spelling of 1305121 in words is "one million, three hundred five thousand, one hundred twenty-one".