1213081 has 2 divisors, whose sum is σ = 1213082. Its totient is φ = 1213080.

The previous prime is 1213063. The next prime is 1213087. The reversal of 1213081 is 1803121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1175056 + 38025 = 1084^2 + 195^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213081 - 2⁵ = 1213049 is a prime.

It is a super-2 number, since 2×1213081² = 2943131025122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1213087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606540 + 606541.

It is an arithmetic number, because the mean of its divisors is an integer number (606541).

2^1213081 is an apocalyptic number.

It is an amenable number.

1213081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213081 is an equidigital number, since it uses as much as digits as its factorization.

1213081 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 1213081 is about 1101.3995641909. The cubic root of 1213081 is about 106.6505911104.

The spelling of 1213081 in words is "one million, two hundred thirteen thousand, eighty-one".