6415625 has 12 divisors (see below), whose sum is σ = 8022924. Its totient is φ = 5130000.

The previous prime is 6415603. The next prime is 6415649. The reversal of 6415625 is 5265146.

6415625 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 5257849 + 1157776 = 2293^2 + 1076^2 .

It is a sliding number, since 6415625 = 15625 + 6400000 and 1/15625 + 1/6400000 = 0.00006415625.

It is not a de Polignac number, because 6415625 - 2¹⁰ = 6414601 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2099 + ... + 4151.

It is an arithmetic number, because the mean of its divisors is an integer number (668577).

Almost surely, 2^6415625 is an apocalyptic number.

It is an amenable number.

6415625 is a deficient number, since it is larger than the sum of its proper divisors (1607299).

6415625 is an frugal number, since it uses more digits than its factorization.

6415625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2078 (or 2058 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 6415625 is about 2532.9084073452. The cubic root of 6415625 is about 185.8145239374.

It can be divided in two parts, 64 and 15625, that multiplied together give a 6-th power (1000000 = 10⁶).

The spelling of 6415625 in words is "six million, four hundred fifteen thousand, six hundred twenty-five".