1025805 has 16 divisors (see below), whose sum is σ = 1790784. Its totient is φ = 497280.

The previous prime is 1025803. The next prime is 1025807. The reversal of 1025805 is 5085201.

It is an interprime number because it is at equal distance from previous prime (1025803) and next prime (1025807).

It is not a de Polignac number, because 1025805 - 2¹ = 1025803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2944 + ... + 3273.

It is an arithmetic number, because the mean of its divisors is an integer number (111924).

2^1025805 is an apocalyptic number.

1025805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1025805 is a deficient number, since it is larger than the sum of its proper divisors (764979).

1025805 is a wasteful number, since it uses less digits than its factorization.

1025805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6236.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1025805 is about 1012.8203197014. The cubic root of 1025805 is about 100.8528720798.

It can be divided in two parts, 1025 and 805, that added together give a triangular number (1830 = T₆₀).

The spelling of 1025805 in words is "one million, twenty-five thousand, eight hundred five".