1025858 has 4 divisors (see below), whose sum is σ = 1538790. Its totient is φ = 512928.

The previous prime is 1025839. The next prime is 1025873. The reversal of 1025858 is 8585201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8585201 = 61 ⋅140741.

It can be written as a sum of positive squares in only one way, i.e., 908209 + 117649 = 953^2 + 343^2 .

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1025858.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 256463 + ... + 256466.

2^1025858 is an apocalyptic number.

1025858 is a deficient number, since it is larger than the sum of its proper divisors (512932).

1025858 is an equidigital number, since it uses as much as digits as its factorization.

1025858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512931.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 1025858 is about 1012.8464839254. The cubic root of 1025858 is about 100.8546089629.

The spelling of 1025858 in words is "one million, twenty-five thousand, eight hundred fifty-eight".