1212401 has 2 divisors, whose sum is σ = 1212402. Its totient is φ = 1212400.

The previous prime is 1212397. The next prime is 1212427. The reversal of 1212401 is 1042121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1210000 + 2401 = 1100^2 + 49^2 .

It is an emirp because it is prime and its reverse (1042121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212401 - 2² = 1212397 is a prime.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606200 + 606201.

It is an arithmetic number, because the mean of its divisors is an integer number (606201).

2^1212401 is an apocalyptic number.

It is an amenable number.

1212401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212401 is an equidigital number, since it uses as much as digits as its factorization.

1212401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1212401 is about 1101.0908227753. The cubic root of 1212401 is about 106.6306595045.

Adding to 1212401 its reverse (1042121), we get a palindrome (2254522).

It can be divided in two parts, 121 and 2401, that multiplied together give a square (290521 = 539²).

The spelling of 1212401 in words is "one million, two hundred twelve thousand, four hundred one".