2102644 has 12 divisors (see below), whose sum is σ = 3769668. Its totient is φ = 1025600.

The previous prime is 2102629. The next prime is 2102647. The reversal of 2102644 is 4462012.

It can be written as a sum of positive squares in 2 ways, for example, as 108900 + 1993744 = 330^2 + 1412^2 .

It is a super-2 number, since 2×2102644² = 8842223581472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102647) 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, 6247 + ... + 6574.

It is an arithmetic number, because the mean of its divisors is an integer number (314139).

2^2102644 is an apocalyptic number.

It is an amenable number.

2102644 is a deficient number, since it is larger than the sum of its proper divisors (1667024).

2102644 is a wasteful number, since it uses less digits than its factorization.

2102644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12866 (or 12864 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2102644 is about 1450.0496543222. The cubic root of 2102644 is about 128.1116376309. Note that the first 3 decimals are identical.

Adding to 2102644 its reverse (4462012), we get a palindrome (6564656).

The spelling of 2102644 in words is "two million, one hundred two thousand, six hundred forty-four".