1249321 has 2 divisors, whose sum is σ = 1249322. Its totient is φ = 1249320.

The previous prime is 1249319. The next prime is 1249333. The reversal of 1249321 is 1239421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 931225 + 318096 = 965^2 + 564^2 .

It is an emirp because it is prime and its reverse (1239421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1249321 - 2¹ = 1249319 is a prime.

It is a super-2 number, since 2×1249321² = 3121605922082, which contains 22 as substring.

Together with 1249319, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1249292 and 1249301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1249301) 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, 624660 + 624661.

It is an arithmetic number, because the mean of its divisors is an integer number (624661).

2^1249321 is an apocalyptic number.

It is an amenable number.

1249321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249321 is an equidigital number, since it uses as much as digits as its factorization.

1249321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 22.

The square root of 1249321 is about 1117.7302894706. The cubic root of 1249321 is about 107.7022261535.

The spelling of 1249321 in words is "one million, two hundred forty-nine thousand, three hundred twenty-one".