1308121 has 2 divisors, whose sum is σ = 1308122. Its totient is φ = 1308120.

The previous prime is 1308091. The next prime is 1308137. The reversal of 1308121 is 1218031.

It is an a-pointer prime, because the next prime (1308137) can be obtained adding 1308121 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 990025 + 318096 = 995^2 + 564^2 .

It is a cyclic number.

It is not a de Polignac number, because 1308121 - 2⁷ = 1307993 is a prime.

It is a super-2 number, since 2×1308121² = 3422361101282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1308095 and 1308104.

It is not a weakly prime, because it can be changed into another prime (1308191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 654060 + 654061.

It is an arithmetic number, because the mean of its divisors is an integer number (654061).

2^1308121 is an apocalyptic number.

It is an amenable number.

1308121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1308121 is an equidigital number, since it uses as much as digits as its factorization.

1308121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1308121 is about 1143.7311747085. The cubic root of 1308121 is about 109.3660782927.

The spelling of 1308121 in words is "one million, three hundred eight thousand, one hundred twenty-one".