1025818 has 8 divisors (see below), whose sum is σ = 1544148. Its totient is φ = 511104.

The previous prime is 1025807. The next prime is 1025819. The reversal of 1025818 is 8185201.

It can be written as a sum of positive squares in 2 ways, for example, as 954529 + 71289 = 977^2 + 267^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1025792 and 1025801.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21 + ... + 1432.

2^1025818 is an apocalyptic number.

1025818 is a deficient number, since it is larger than the sum of its proper divisors (518330).

1025818 is a wasteful number, since it uses less digits than its factorization.

1025818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1808.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 1025818 is about 1012.8267374038. The cubic root of 1025818 is about 100.8532981133.

The spelling of 1025818 in words is "one million, twenty-five thousand, eight hundred eighteen".