1018945 has 4 divisors (see below), whose sum is σ = 1222740. Its totient is φ = 815152.

The previous prime is 1018937. The next prime is 1018949. The reversal of 1018945 is 5498101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 194481 + 824464 = 441^2 + 908^2 .

It is a cyclic number.

It is not a de Polignac number, because 1018945 - 2³ = 1018937 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1018949) 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, 101890 + ... + 101899.

It is an arithmetic number, because the mean of its divisors is an integer number (305685).

2^1018945 is an apocalyptic number.

It is an amenable number.

1018945 is a deficient number, since it is larger than the sum of its proper divisors (203795).

1018945 is an equidigital number, since it uses as much as digits as its factorization.

1018945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203794.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1018945 is about 1009.4280558812. The cubic root of 1018945 is about 100.6275535275.

The spelling of 1018945 in words is "one million, eighteen thousand, nine hundred forty-five".