2126640 has 40 divisors (see below), whose sum is σ = 6593328. Its totient is φ = 567040.

The previous prime is 2126639. The next prime is 2126659. The reversal of 2126640 is 466212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4191 + ... + 4670.

2^2126640 is an apocalyptic number.

2126640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2126640 is an abundant number, since it is smaller than the sum of its proper divisors (4466688).

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

2126640 is a wasteful number, since it uses less digits than its factorization.

2126640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8877 (or 8871 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 2126640 is about 1458.3003805801. The cubic root of 2126640 is about 128.5971447679.

The spelling of 2126640 in words is "two million, one hundred twenty-six thousand, six hundred forty".