2105403425 has 6 divisors (see below), whose sum is σ = 2610700278. Its totient is φ = 1684322720.

The previous prime is 2105403413. The next prime is 2105403427. The reversal of 2105403425 is 5243045012.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 729216016 + 1376187409 = 27004^2 + 37097^2 .

It is not a de Polignac number, because 2105403425 - 2¹⁰ = 2105402401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2105403394 and 2105403403.

It is not an unprimeable number, because it can be changed into a prime (2105403427) 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, 42108044 + ... + 42108093.

It is an arithmetic number, because the mean of its divisors is an integer number (435116713).

Almost surely, 2^2105403425 is an apocalyptic number.

2105403425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2105403425 is a deficient number, since it is larger than the sum of its proper divisors (505296853).

2105403425 is an equidigital number, since it uses as much as digits as its factorization.

2105403425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84216147 (or 84216142 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 2105403425 is about 45884.6752739953. The cubic root of 2105403425 is about 1281.6765597764.

Adding to 2105403425 its reverse (5243045012), we get a palindrome (7348448437).

The spelling of 2105403425 in words is "two billion, one hundred five million, four hundred three thousand, four hundred twenty-five".