1305925 has 6 divisors (see below), whose sum is σ = 1619378. Its totient is φ = 1044720.

The previous prime is 1305919. The next prime is 1305947. The reversal of 1305925 is 5295031.

It can be written as a sum of positive squares in 3 ways, for example, as 49284 + 1256641 = 222^2 + 1121^2 .

It is not a de Polignac number, because 1305925 - 2⁵ = 1305893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 52237 = 1305925 / (1 + 3 + 0 + 5 + 9 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1305925.

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, 26094 + ... + 26143.

2^1305925 is an apocalyptic number.

It is an amenable number.

1305925 is a deficient number, since it is larger than the sum of its proper divisors (313453).

1305925 is an equidigital number, since it uses as much as digits as its factorization.

1305925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52247 (or 52242 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 1305925 is about 1142.7707556636. The cubic root of 1305925 is about 109.3048448067.

The spelling of 1305925 in words is "one million, three hundred five thousand, nine hundred twenty-five".