1212361 has 2 divisors, whose sum is σ = 1212362. Its totient is φ = 1212360.

The previous prime is 1212347. The next prime is 1212373. The reversal of 1212361 is 1632121.

1212361 is nontrivially palindromic in base 2.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 962361 + 250000 = 981^2 + 500^2 .

It is an emirp because it is prime and its reverse (1632121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212361 - 2¹³ = 1204169 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a zygodrome in base 8.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606180 + 606181.

It is an arithmetic number, because the mean of its divisors is an integer number (606181).

2^1212361 is an apocalyptic number.

It is an amenable number.

1212361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212361 is an equidigital number, since it uses as much as digits as its factorization.

1212361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 16.

The square root of 1212361 is about 1101.0726588196. The cubic root of 1212361 is about 106.6294868250.

Adding to 1212361 its reverse (1632121), we get a palindrome (2844482).

The spelling of 1212361 in words is "one million, two hundred twelve thousand, three hundred sixty-one".