1026644 has 6 divisors (see below), whose sum is σ = 1796634. Its totient is φ = 513320.

The previous prime is 1026593. The next prime is 1026661. The reversal of 1026644 is 4466201.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1024144 + 2500 = 1012^2 + 50^2 .

It is a nialpdrome in base 4 and base 16.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 128327 + ... + 128334.

It is an arithmetic number, because the mean of its divisors is an integer number (299439).

2^1026644 is an apocalyptic number.

It is an amenable number.

1026644 is a deficient number, since it is larger than the sum of its proper divisors (769990).

1026644 is a wasteful number, since it uses less digits than its factorization.

1026644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256665 (or 256663 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1026644 is about 1013.2344249975. The cubic root of 1026644 is about 100.8803602480.

The spelling of 1026644 in words is "one million, twenty-six thousand, six hundred forty-four".