1385149 has 2 divisors, whose sum is σ = 1385150. Its totient is φ = 1385148.

The previous prime is 1385147. The next prime is 1385171. The reversal of 1385149 is 9415831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 822649 + 562500 = 907^2 + 750^2 .

It is an emirp because it is prime and its reverse (9415831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1385149 - 2¹ = 1385147 is a prime.

Together with 1385147, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1385149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1385147) 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, 692574 + 692575.

It is an arithmetic number, because the mean of its divisors is an integer number (692575).

2^1385149 is an apocalyptic number.

It is an amenable number.

1385149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385149 is an equidigital number, since it uses as much as digits as its factorization.

1385149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 31.

The square root of 1385149 is about 1176.9235319255. The cubic root of 1385149 is about 111.4719241315.

The spelling of 1385149 in words is "one million, three hundred eighty-five thousand, one hundred forty-nine".