2126820025 has 18 divisors (see below), whose sum is σ = 2898807086. Its totient is φ = 1546776000.

The previous prime is 2126820011. The next prime is 2126820029. The reversal of 2126820025 is 5200286212.

It can be written as a sum of positive squares in 3 ways, for example, as 1517824 + 2125302201 = 1232^2 + 46101^2 .

It is not a de Polignac number, because 2126820025 - 2⁷ = 2126819897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2126819975 and 2126820002.

It is not an unprimeable number, because it can be changed into a prime (2126820029) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 348516 + ... + 354565.

Almost surely, 2^2126820025 is an apocalyptic number.

2126820025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2126820025 is a deficient number, since it is larger than the sum of its proper divisors (771987061).

2126820025 is a wasteful number, since it uses less digits than its factorization.

2126820025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703113 (or 703097 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 2126820025 is about 46117.4590041559. The cubic root of 2126820025 is about 1286.0077334748.

The spelling of 2126820025 in words is "two billion, one hundred twenty-six million, eight hundred twenty thousand, twenty-five".