4006725 has 24 divisors (see below), whose sum is σ = 6791232. Its totient is φ = 2083200.

The previous prime is 4006721. The next prime is 4006729. The reversal of 4006725 is 5276004.

It is a happy number.

4006725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (4006721) and next prime (4006729).

It is not a de Polignac number, because 4006725 - 2² = 4006721 is a prime.

It is a Curzon number.

4006725 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4006695 and 4006704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4006721) 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 23 ways as a sum of consecutive naturals, for example, 2424 + ... + 3726.

It is an arithmetic number, because the mean of its divisors is an integer number (282968).

Almost surely, 2^4006725 is an apocalyptic number.

It is an amenable number.

4006725 is a deficient number, since it is larger than the sum of its proper divisors (2784507).

4006725 is a wasteful number, since it uses less digits than its factorization.

4006725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357 (or 1352 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 4006725 is about 2001.6805439430. The cubic root of 4006725 is about 158.8290159890.

The spelling of 4006725 in words is "four million, six thousand, seven hundred twenty-five".