1040393 has 4 divisors (see below), whose sum is σ = 1042560. Its totient is φ = 1038228.

The previous prime is 1040387. The next prime is 1040407. The reversal of 1040393 is 3930401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3930401 = 23 ⋅170887.

It is a cyclic number.

It is not a de Polignac number, because 1040393 - 2¹² = 1036297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1040353) 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, 5 + ... + 1442.

It is an arithmetic number, because the mean of its divisors is an integer number (260640).

2^1040393 is an apocalyptic number.

It is an amenable number.

1040393 is a deficient number, since it is larger than the sum of its proper divisors (2167).

1040393 is an equidigital number, since it uses as much as digits as its factorization.

1040393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2166.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1040393 is about 1019.9965686217. The cubic root of 1040393 is about 101.3287006866.

Adding to 1040393 its reverse (3930401), we get a palindrome (4970794).

The spelling of 1040393 in words is "one million, forty thousand, three hundred ninety-three".