1040385 has 16 divisors (see below), whose sum is σ = 1704384. Its totient is φ = 541632.

The previous prime is 1040381. The next prime is 1040387. The reversal of 1040385 is 5830401.

It is not a de Polignac number, because 1040385 - 2² = 1040381 is a prime.

1040385 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1040381) 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, 162 + ... + 1451.

It is an arithmetic number, because the mean of its divisors is an integer number (106524).

It is a Proth number, since it is equal to 127 ⋅ 2¹³ + 1 and 127 < 2¹³.

2^1040385 is an apocalyptic number.

1040385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1040385 is a deficient number, since it is larger than the sum of its proper divisors (663999).

1040385 is a wasteful number, since it uses less digits than its factorization.

1040385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1040385 is about 1019.9926470323. The cubic root of 1040385 is about 101.3284409669.

Adding to 1040385 its reverse (5830401), we get a palindrome (6870786).

The spelling of 1040385 in words is "one million, forty thousand, three hundred eighty-five".