1385161 has 4 divisors (see below), whose sum is σ = 1392532. Its totient is φ = 1377792.

The previous prime is 1385149. The next prime is 1385171. The reversal of 1385161 is 1615831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1615831 = 7 ⋅230833.

It can be written as a sum of positive squares in 2 ways, for example, as 866761 + 518400 = 931^2 + 720^2 .

It is a cyclic number.

It is not a de Polignac number, because 1385161 - 2¹¹ = 1383113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1385101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3396 + ... + 3781.

It is an arithmetic number, because the mean of its divisors is an integer number (348133).

2^1385161 is an apocalyptic number.

1385161 is the 680-th hex number.

It is an amenable number.

1385161 is a deficient number, since it is larger than the sum of its proper divisors (7371).

1385161 is an equidigital number, since it uses as much as digits as its factorization.

1385161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7370.

The product of its digits is 720, while the sum is 25.

The square root of 1385161 is about 1176.9286299517. The cubic root of 1385161 is about 111.4722460365.

The spelling of 1385161 in words is "one million, three hundred eighty-five thousand, one hundred sixty-one".