1385215 has 16 divisors (see below), whose sum is σ = 1816416. Its totient is φ = 1008000.

The previous prime is 1385213. The next prime is 1385273. The reversal of 1385215 is 5125831.

It is a happy number.

It is not a de Polignac number, because 1385215 - 2¹ = 1385213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1385215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6460 + ... + 6670.

It is an arithmetic number, because the mean of its divisors is an integer number (113526).

2^1385215 is an apocalyptic number.

1385215 is a deficient number, since it is larger than the sum of its proper divisors (431201).

1385215 is a wasteful number, since it uses less digits than its factorization.

1385215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330.

The product of its digits is 1200, while the sum is 25.

The square root of 1385215 is about 1176.9515707964. The cubic root of 1385215 is about 111.4736945861.

It can be divided in two parts, 1385 and 215, that added together give a square (1600 = 40²).

The spelling of 1385215 in words is "one million, three hundred eighty-five thousand, two hundred fifteen".