1025812 has 12 divisors (see below), whose sum is σ = 1803060. Its totient is φ = 510656.

The previous prime is 1025807. The next prime is 1025819. The reversal of 1025812 is 2185201.

It can be written as a sum of positive squares in 2 ways, for example, as 454276 + 571536 = 674^2 + 756^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1025812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025819) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 864 + ... + 1672.

It is an arithmetic number, because the mean of its divisors is an integer number (150255).

2^1025812 is an apocalyptic number.

It is an amenable number.

1025812 is a deficient number, since it is larger than the sum of its proper divisors (777248).

1025812 is a wasteful number, since it uses less digits than its factorization.

1025812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130 (or 1128 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1025812 is about 1012.8237753923. The cubic root of 1025812 is about 100.8531014829.

The spelling of 1025812 in words is "one million, twenty-five thousand, eight hundred twelve".