1213601 has 2 divisors, whose sum is σ = 1213602. Its totient is φ = 1213600.

The previous prime is 1213591. The next prime is 1213607. The reversal of 1213601 is 1063121.

1213601 is nontrivially palindromic in base 4.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1002001 + 211600 = 1001^2 + 460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1213607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606800 + 606801.

It is an arithmetic number, because the mean of its divisors is an integer number (606801).

2^1213601 is an apocalyptic number.

It is an amenable number.

1213601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213601 is an equidigital number, since it uses as much as digits as its factorization.

1213601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1213601 is about 1101.6356021843. The cubic root of 1213601 is about 106.6658279014.

Adding to 1213601 its reverse (1063121), we get a palindrome (2276722).

The spelling of 1213601 in words is "one million, two hundred thirteen thousand, six hundred one".