8402725 has 6 divisors (see below), whose sum is σ = 10419410. Its totient is φ = 6722160.

The previous prime is 8402717. The next prime is 8402747. The reversal of 8402725 is 5272048.

It can be written as a sum of positive squares in 3 ways, for example, as 2414916 + 5987809 = 1554^2 + 2447^2 .

It is not a de Polignac number, because 8402725 - 2³ = 8402717 is a prime.

8402725 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8402693 and 8402702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 168030 + ... + 168079.

Almost surely, 2^8402725 is an apocalyptic number.

It is an amenable number.

8402725 is a deficient number, since it is larger than the sum of its proper divisors (2016685).

8402725 is a wasteful number, since it uses less digits than its factorization.

8402725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336119 (or 336114 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 8402725 is about 2898.7454182801. The cubic root of 8402725 is about 203.3012505743.

The spelling of 8402725 in words is "eight million, four hundred two thousand, seven hundred twenty-five".