1381529 has 2 divisors, whose sum is σ = 1381530. Its totient is φ = 1381528.

The previous prime is 1381519. The next prime is 1381537. The reversal of 1381529 is 9251831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1177225 + 204304 = 1085^2 + 452^2 .

It is an emirp because it is prime and its reverse (9251831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1381529 - 2⁸ = 1381273 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1381519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690764 + 690765.

It is an arithmetic number, because the mean of its divisors is an integer number (690765).

2^1381529 is an apocalyptic number.

It is an amenable number.

1381529 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381529 is an equidigital number, since it uses as much as digits as its factorization.

1381529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 29.

The square root of 1381529 is about 1175.3846179017. The cubic root of 1381529 is about 111.3747311198.

The spelling of 1381529 in words is "one million, three hundred eighty-one thousand, five hundred twenty-nine".