1383521 has 2 divisors, whose sum is σ = 1383522. Its totient is φ = 1383520.

The previous prime is 1383517. The next prime is 1383553. The reversal of 1383521 is 1253831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1290496 + 93025 = 1136^2 + 305^2 .

It is an emirp because it is prime and its reverse (1253831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1383521 - 2² = 1383517 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1383121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 691760 + 691761.

It is an arithmetic number, because the mean of its divisors is an integer number (691761).

2^1383521 is an apocalyptic number.

It is an amenable number.

1383521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1383521 is an equidigital number, since it uses as much as digits as its factorization.

1383521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 23.

The square root of 1383521 is about 1176.2316948629. The cubic root of 1383521 is about 111.4282351043.

The spelling of 1383521 in words is "one million, three hundred eighty-three thousand, five hundred twenty-one".