1305625 has 10 divisors (see below), whose sum is σ = 1632290. Its totient is φ = 1044000.

The previous prime is 1305607. The next prime is 1305637. The reversal of 1305625 is 5265031.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 257049 + 1048576 = 507^2 + 1024^2 .

It is not a de Polignac number, because 1305625 - 2⁵ = 1305593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1305596 and 1305605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 420 + ... + 1669.

It is an arithmetic number, because the mean of its divisors is an integer number (163229).

2^1305625 is an apocalyptic number.

It is an amenable number.

1305625 is a deficient number, since it is larger than the sum of its proper divisors (326665).

1305625 is an frugal number, since it uses more digits than its factorization.

1305625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2109 (or 2094 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 1305625 is about 1142.6394882026. The cubic root of 1305625 is about 109.2964742482.

The spelling of 1305625 in words is "one million, three hundred five thousand, six hundred twenty-five".