2126656 has 56 divisors (see below), whose sum is σ = 4974336. Its totient is φ = 883200.

The previous prime is 2126639. The next prime is 2126659. The reversal of 2126656 is 6566212.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2126659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21006 + ... + 21106.

2^2126656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2126656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2487168).

2126656 is an abundant number, since it is smaller than the sum of its proper divisors (2847680).

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

2126656 is a wasteful number, since it uses less digits than its factorization.

2126656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 157 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 2126656 is about 1458.3058664080. The cubic root of 2126656 is about 128.5974672718.

The spelling of 2126656 in words is "two million, one hundred twenty-six thousand, six hundred fifty-six".