307121 has 2 divisors, whose sum is σ = 307122. Its totient is φ = 307120.

The previous prime is 307103. The next prime is 307129. The reversal of 307121 is 121703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250000 + 57121 = 500^2 + 239^2 .

It is a cyclic number.

It is not a de Polignac number, because 307121 - 2¹⁴ = 290737 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 307096 and 307105.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 307121.

It is not a weakly prime, because it can be changed into another prime (307129) 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, 153560 + 153561.

It is an arithmetic number, because the mean of its divisors is an integer number (153561).

2³⁰⁷¹²¹ is an apocalyptic number.

It is an amenable number.

307121 is a deficient number, since it is larger than the sum of its proper divisors (1).

307121 is an equidigital number, since it uses as much as digits as its factorization.

307121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 307121 is about 554.1849871658. The cubic root of 307121 is about 67.4688287716.

Adding to 307121 its reverse (121703), we get a palindrome (428824).

The spelling of 307121 in words is "three hundred seven thousand, one hundred twenty-one", and thus it is an iban number.