6720925 has 24 divisors (see below), whose sum is σ = 8749440. Its totient is φ = 5116800.

The previous prime is 6720911. The next prime is 6720929. The reversal of 6720925 is 5290276.

It is a de Polignac number, because none of the positive numbers 2^k-6720925 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6720929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80934 + ... + 81016.

It is an arithmetic number, because the mean of its divisors is an integer number (364560).

Almost surely, 2^6720925 is an apocalyptic number.

It is an amenable number.

6720925 is a deficient number, since it is larger than the sum of its proper divisors (2028515).

6720925 is a wasteful number, since it uses less digits than its factorization.

6720925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 6720925 is about 2592.4746864724. The cubic root of 6720925 is about 188.7164172816.

It can be divided in two parts, 67 and 20925, that multiplied together give a triangular number (1401975 = T₁₆₇₄).

The spelling of 6720925 in words is "six million, seven hundred twenty thousand, nine hundred twenty-five".