3921025 has 6 divisors (see below), whose sum is σ = 4862102. Its totient is φ = 3136800.

The previous prime is 3921023. The next prime is 3921037. The reversal of 3921025 is 5201293.

3921025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1364224 + 2556801 = 1168^2 + 1599^2 .

It is not a de Polignac number, because 3921025 - 2¹ = 3921023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3920987 and 3921005.

It is not an unprimeable number, because it can be changed into a prime (3921023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78396 + ... + 78445.

Almost surely, 2^3921025 is an apocalyptic number.

It is an amenable number.

3921025 is a deficient number, since it is larger than the sum of its proper divisors (941077).

3921025 is a wasteful number, since it uses less digits than its factorization.

3921025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156851 (or 156846 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 3921025 is about 1980.1578219930. The cubic root of 3921025 is about 157.6884449701.

The spelling of 3921025 in words is "three million, nine hundred twenty-one thousand, twenty-five".