4020725 has 6 divisors (see below), whose sum is σ = 4985730. Its totient is φ = 3216560.

The previous prime is 4020719. The next prime is 4020727. The reversal of 4020725 is 5270204.

It can be written as a sum of positive squares in 3 ways, for example, as 56644 + 3964081 = 238^2 + 1991^2 .

It is not a de Polignac number, because 4020725 - 2²⁰ = 2972149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4020697 and 4020706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020727) 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, 80390 + ... + 80439.

It is an arithmetic number, because the mean of its divisors is an integer number (830955).

Almost surely, 2^4020725 is an apocalyptic number.

It is an amenable number.

4020725 is a deficient number, since it is larger than the sum of its proper divisors (965005).

4020725 is a wasteful number, since it uses less digits than its factorization.

4020725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160839 (or 160834 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 4020725 is about 2005.1745559926. The cubic root of 4020725 is about 159.0137904524.

Adding to 4020725 its reverse (5270204), we get a palindrome (9290929).

The spelling of 4020725 in words is "four million, twenty thousand, seven hundred twenty-five".