1018645 has 8 divisors (see below), whose sum is σ = 1252440. Its totient is φ = 794880.

The previous prime is 1018643. The next prime is 1018649. The reversal of 1018645 is 5468101.

It can be written as a sum of positive squares in 4 ways, for example, as 14641 + 1004004 = 121^2 + 1002^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1018645 - 2¹ = 1018643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1018643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2280 + ... + 2689.

It is an arithmetic number, because the mean of its divisors is an integer number (156555).

2^1018645 is an apocalyptic number.

It is an amenable number.

1018645 is a deficient number, since it is larger than the sum of its proper divisors (233795).

1018645 is an equidigital number, since it uses as much as digits as its factorization.

1018645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5015.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1018645 is about 1009.2794459415. The cubic root of 1018645 is about 100.6176768972.

The spelling of 1018645 in words is "one million, eighteen thousand, six hundred forty-five".