1385391 has 16 divisors (see below), whose sum is σ = 2169344. Its totient is φ = 769824.

The previous prime is 1385389. The next prime is 1385393. The reversal of 1385391 is 1935831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1385389) and next prime (1385393).

It is not a de Polignac number, because 1385391 - 2¹ = 1385389 is a prime.

It is a Duffinian number.

1385391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115 + ... + 1668.

It is an arithmetic number, because the mean of its divisors is an integer number (135584).

2^1385391 is an apocalyptic number.

1385391 is a deficient number, since it is larger than the sum of its proper divisors (783953).

1385391 is a wasteful number, since it uses less digits than its factorization.

1385391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830.

The product of its digits is 3240, while the sum is 30.

The square root of 1385391 is about 1177.0263378532. The cubic root of 1385391 is about 111.4784155233.

The spelling of 1385391 in words is "one million, three hundred eighty-five thousand, three hundred ninety-one".