2125578 has 64 divisors (see below), whose sum is σ = 5564160. Its totient is φ = 525312.

The previous prime is 2125567. The next prime is 2125579. The reversal of 2125578 is 8755212.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125579) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9168 + ... + 9396.

It is an arithmetic number, because the mean of its divisors is an integer number (86940).

2^2125578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2125578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2782080).

2125578 is an abundant number, since it is smaller than the sum of its proper divisors (3438582).

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

2125578 is a wasteful number, since it uses less digits than its factorization.

2125578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271.

The product of its digits is 5600, while the sum is 30.

The square root of 2125578 is about 1457.9362125964. The cubic root of 2125578 is about 128.5757349528.

The spelling of 2125578 in words is "two million, one hundred twenty-five thousand, five hundred seventy-eight".