1012645 has 4 divisors (see below), whose sum is σ = 1215180. Its totient is φ = 810112.

The previous prime is 1012637. The next prime is 1012657. The reversal of 1012645 is 5462101.

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 492804 + 519841 = 702^2 + 721^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012645 - 2³ = 1012637 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 101260 + ... + 101269.

It is an arithmetic number, because the mean of its divisors is an integer number (303795).

2^1012645 is an apocalyptic number.

It is an amenable number.

1012645 is a deficient number, since it is larger than the sum of its proper divisors (202535).

1012645 is an equidigital number, since it uses as much as digits as its factorization.

1012645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202534.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1012645 is about 1006.3026383748. The cubic root of 1012645 is about 100.4197357540.

Adding to 1012645 its reverse (5462101), we get a palindrome (6474746).

The spelling of 1012645 in words is "one million, twelve thousand, six hundred forty-five".