1367921 has 2 divisors, whose sum is σ = 1367922. Its totient is φ = 1367920.

The previous prime is 1367903. The next prime is 1367929. The reversal of 1367921 is 1297631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 790321 + 577600 = 889^2 + 760^2 .

It is an emirp because it is prime and its reverse (1297631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1367921 - 2⁶ = 1367857 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1367929) 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, 683960 + 683961.

It is an arithmetic number, because the mean of its divisors is an integer number (683961).

2^1367921 is an apocalyptic number.

It is an amenable number.

1367921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1367921 is an equidigital number, since it uses as much as digits as its factorization.

1367921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 29.

The square root of 1367921 is about 1169.5815491021. The cubic root of 1367921 is about 111.0078451290.

The spelling of 1367921 in words is "one million, three hundred sixty-seven thousand, nine hundred twenty-one".