1025865 has 40 divisors (see below), whose sum is σ = 1960200. Its totient is φ = 511488.

The previous prime is 1025839. The next prime is 1025873. The reversal of 1025865 is 5685201.

It can be written as a sum of positive squares in 4 ways, for example, as 63504 + 962361 = 252^2 + 981^2 .

It is not a de Polignac number, because 1025865 - 2¹³ = 1017673 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6811 + ... + 6959.

It is an arithmetic number, because the mean of its divisors is an integer number (49005).

2^1025865 is an apocalyptic number.

1025865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1025865 is a deficient number, since it is larger than the sum of its proper divisors (934335).

1025865 is a wasteful number, since it uses less digits than its factorization.

1025865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1025865 is about 1012.8499395271. The cubic root of 1025865 is about 100.8548383581.

The spelling of 1025865 in words is "one million, twenty-five thousand, eight hundred sixty-five".