2105420025 has 48 divisors (see below), whose sum is σ = 3603880448. Its totient is φ = 1083456000.

The previous prime is 2105420021. The next prime is 2105420033. The reversal of 2105420025 is 5200245012.

It is a happy number.

It is not a de Polignac number, because 2105420025 - 2² = 2105420021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2105419983 and 2105420010.

It is not an unprimeable number, because it can be changed into a prime (2105420021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 921885 + ... + 924165.

Almost surely, 2^2105420025 is an apocalyptic number.

2105420025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2105420025 is a deficient number, since it is larger than the sum of its proper divisors (1498460423).

2105420025 is a wasteful number, since it uses less digits than its factorization.

2105420025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722 (or 2717 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 2105420025 is about 45884.8561619190. The cubic root of 2105420025 is about 1281.6799282164.

Adding to 2105420025 its reverse (5200245012), we get a palindrome (7305665037).

The spelling of 2105420025 in words is "two billion, one hundred five million, four hundred twenty thousand, twenty-five".