8409725 has 12 divisors (see below), whose sum is σ = 10671936. Its totient is φ = 6570480.

The previous prime is 8409721. The next prime is 8409829. The reversal of 8409725 is 5279048.

It is a happy number.

It is not a de Polignac number, because 8409725 - 2² = 8409721 is a prime.

It is a d-powerful number, because it can be written as 8 + 4⁶ + 0 + 9² + 7⁵ + 2²³ + 5³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8409721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2837 + ... + 4986.

It is an arithmetic number, because the mean of its divisors is an integer number (889328).

Almost surely, 2^8409725 is an apocalyptic number.

It is an amenable number.

8409725 is a deficient number, since it is larger than the sum of its proper divisors (2262211).

8409725 is a wasteful number, since it uses less digits than its factorization.

8409725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7876 (or 7871 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 8409725 is about 2899.9525858193. The cubic root of 8409725 is about 203.3576891605.

The spelling of 8409725 in words is "eight million, four hundred nine thousand, seven hundred twenty-five".