2125520 has 30 divisors (see below), whose sum is σ = 4972338. Its totient is φ = 844992.

The previous prime is 2125517. The next prime is 2125523. The reversal of 2125520 is 255212.

It is an interprime number because it is at equal distance from previous prime (2125517) and next prime (2125523).

It can be written as a sum of positive squares in only one way, i.e., 1700416 + 425104 = 1304^2 + 652^2 .

It is a hoax number, since the sum of its digits (17) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12959 + ... + 13121.

2^2125520 is an apocalyptic number.

2125520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2125520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2486169).

2125520 is an abundant number, since it is smaller than the sum of its proper divisors (2846818).

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

2125520 is an equidigital number, since it uses as much as digits as its factorization.

2125520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 2125520 is about 1457.9163213299. The cubic root of 2125520 is about 128.5745654731.

The spelling of 2125520 in words is "two million, one hundred twenty-five thousand, five hundred twenty".