1006945 has 4 divisors (see below), whose sum is σ = 1208340. Its totient is φ = 805552.

The previous prime is 1006937. The next prime is 1006949. The reversal of 1006945 is 5496001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5496001 = 7 ⋅785143.

It can be written as a sum of positive squares in 2 ways, for example, as 692224 + 314721 = 832^2 + 561^2 .

It is a cyclic number.

It is not a de Polignac number, because 1006945 - 2³ = 1006937 is a prime.

1006945 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1006949) 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, 100690 + ... + 100699.

It is an arithmetic number, because the mean of its divisors is an integer number (302085).

2^1006945 is an apocalyptic number.

It is an amenable number.

1006945 is a deficient number, since it is larger than the sum of its proper divisors (201395).

1006945 is an equidigital number, since it uses as much as digits as its factorization.

1006945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201394.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1006945 is about 1003.4664917176. The cubic root of 1006945 is about 100.2309661357.

The spelling of 1006945 in words is "one million, six thousand, nine hundred forty-five".