1305725 has 12 divisors (see below), whose sum is σ = 1675860. Its totient is φ = 1008000.

The previous prime is 1305713. The next prime is 1305739. The reversal of 1305725 is 5275031.

It can be written as a sum of positive squares in 6 ways, for example, as 143641 + 1162084 = 379^2 + 1078^2 .

It is not a de Polignac number, because 1305725 - 2⁴ = 1305709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1305725.

It is a congruent 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, 176 + ... + 1625.

It is an arithmetic number, because the mean of its divisors is an integer number (139655).

2^1305725 is an apocalyptic number.

It is an amenable number.

1305725 is a deficient number, since it is larger than the sum of its proper divisors (370135).

1305725 is a wasteful number, since it uses less digits than its factorization.

1305725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840 (or 1835 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 1305725 is about 1142.6832456985. The cubic root of 1305725 is about 109.2992645768.

The spelling of 1305725 in words is "one million, three hundred five thousand, seven hundred twenty-five".