1102644 has 36 divisors (see below), whose sum is σ = 2822820. Its totient is φ = 362880.

The previous prime is 1102583. The next prime is 1102663. The reversal of 1102644 is 4462011.

It can be written as a sum of positive squares in 2 ways, for example, as 756900 + 345744 = 870^2 + 588^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3784 + ... + 4064.

2^1102644 is an apocalyptic number.

It is an amenable number.

1102644 is an abundant number, since it is smaller than the sum of its proper divisors (1720176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1102644 is a wasteful number, since it uses less digits than its factorization.

1102644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1102644 is about 1050.0685691897. The cubic root of 1102644 is about 103.3106529018.

Adding to 1102644 its reverse (4462011), we get a palindrome (5564655).

The spelling of 1102644 in words is "one million, one hundred two thousand, six hundred forty-four".