1303121 has 2 divisors, whose sum is σ = 1303122. Its totient is φ = 1303120.

The previous prime is 1303117. The next prime is 1303129. The reversal of 1303121 is 1213031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1113025 + 190096 = 1055^2 + 436^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303121 - 2² = 1303117 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1303129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651560 + 651561.

It is an arithmetic number, because the mean of its divisors is an integer number (651561).

2^1303121 is an apocalyptic number.

It is an amenable number.

1303121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1303121 is an equidigital number, since it uses as much as digits as its factorization.

1303121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1303121 is about 1141.5432536702. The cubic root of 1303121 is about 109.2265579203.

Adding to 1303121 its reverse (1213031), we get a palindrome (2516152).

The spelling of 1303121 in words is "one million, three hundred three thousand, one hundred twenty-one".