6503725 has 12 divisors (see below), whose sum is σ = 8120884. Its totient is φ = 5166720.

The previous prime is 6503713. The next prime is 6503737. The reversal of 6503725 is 5273056.

It is an interprime number because it is at equal distance from previous prime (6503713) and next prime (6503737).

It can be written as a sum of positive squares in 6 ways, for example, as 729316 + 5774409 = 854^2 + 2403^2 .

It is not a de Polignac number, because 6503725 - 2⁷ = 6503597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6503693 and 6503702.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 3097 + ... + 4753.

Almost surely, 2^6503725 is an apocalyptic number.

It is an amenable number.

6503725 is a deficient number, since it is larger than the sum of its proper divisors (1617159).

6503725 is a wasteful number, since it uses less digits than its factorization.

6503725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824 (or 1819 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 6503725 is about 2550.2401847669. The cubic root of 6503725 is about 186.6612012997.

The spelling of 6503725 in words is "six million, five hundred three thousand, seven hundred twenty-five".