2125638 has 24 divisors (see below), whose sum is σ = 4633200. Its totient is φ = 704304.

The previous prime is 2125621. The next prime is 2125649. The reversal of 2125638 is 8365212.

2125638 is a `hidden beast` number, since 2 + 1 + 25 + 638 = 666.

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

It is a Curzon number.

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, 4623 + ... + 5061.

It is an arithmetic number, because the mean of its divisors is an integer number (193050).

2^2125638 is an apocalyptic number.

2125638 is an abundant number, since it is smaller than the sum of its proper divisors (2507562).

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

2125638 is a wasteful number, since it uses less digits than its factorization.

2125638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716 (or 713 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2125638 is about 1457.9567894831. The cubic root of 2125638 is about 128.5769447369.

The spelling of 2125638 in words is "two million, one hundred twenty-five thousand, six hundred thirty-eight".