1005397 has 4 divisors (see below), whose sum is σ = 1064556. Its totient is φ = 946240.

The previous prime is 1005391. The next prime is 1005409. The reversal of 1005397 is 7935001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7935001 = 53 ⋅149717.

It can be written as a sum of positive squares in 2 ways, for example, as 707281 + 298116 = 841^2 + 546^2 .

It is a cyclic number.

It is not a de Polignac number, because 1005397 - 2⁷ = 1005269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005391) 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 3 ways as a sum of consecutive naturals, for example, 29554 + ... + 29587.

It is an arithmetic number, because the mean of its divisors is an integer number (266139).

2^1005397 is an apocalyptic number.

1005397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1005397 is a deficient number, since it is larger than the sum of its proper divisors (59159).

1005397 is an equidigital number, since it uses as much as digits as its factorization.

1005397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59158.

The product of its (nonzero) digits is 945, while the sum is 25.

The square root of 1005397 is about 1002.6948688410. The cubic root of 1005397 is about 100.1795773268.

The spelling of 1005397 in words is "one million, five thousand, three hundred ninety-seven".