1457321 has 2 divisors, whose sum is σ = 1457322. Its totient is φ = 1457320.

The previous prime is 1457293. The next prime is 1457333. The reversal of 1457321 is 1237541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1297321 + 160000 = 1139^2 + 400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1457321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1457371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 728660 + 728661.

It is an arithmetic number, because the mean of its divisors is an integer number (728661).

2^1457321 is an apocalyptic number.

It is an amenable number.

1457321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1457321 is an equidigital number, since it uses as much as digits as its factorization.

1457321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 23.

The square root of 1457321 is about 1207.1955102634. The cubic root of 1457321 is about 113.3752891566.

The spelling of 1457321 in words is "one million, four hundred fifty-seven thousand, three hundred twenty-one".