2125890 has 96 divisors (see below), whose sum is σ = 6289920. Its totient is φ = 494208.

The previous prime is 2125889. The next prime is 2125919. The reversal of 2125890 is 985212.

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26871 + ... + 26949.

It is an arithmetic number, because the mean of its divisors is an integer number (65520).

2^2125890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2125890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3144960).

2125890 is an abundant number, since it is smaller than the sum of its proper divisors (4164030).

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

2125890 is a wasteful number, since it uses less digits than its factorization.

2125890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 2125890 is about 1458.0432092363. The cubic root of 2125890 is about 128.5820255816.

The spelling of 2125890 in words is "two million, one hundred twenty-five thousand, eight hundred ninety".