1226321 has 2 divisors, whose sum is σ = 1226322. Its totient is φ = 1226320.

The previous prime is 1226311. The next prime is 1226339. The reversal of 1226321 is 1236221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 929296 + 297025 = 964^2 + 545^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226321 - 2⁶ = 1226257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1226321.

It is not a weakly prime, because it can be changed into another prime (1226311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613160 + 613161.

It is an arithmetic number, because the mean of its divisors is an integer number (613161).

2^1226321 is an apocalyptic number.

It is an amenable number.

1226321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226321 is an equidigital number, since it uses as much as digits as its factorization.

1226321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 17.

The square root of 1226321 is about 1107.3937872320. The cubic root of 1226321 is about 107.0371955583.

The spelling of 1226321 in words is "one million, two hundred twenty-six thousand, three hundred twenty-one".