1025838 has 48 divisors (see below), whose sum is σ = 2521680. Its totient is φ = 308880.

The previous prime is 1025819. The next prime is 1025839. The reversal of 1025838 is 8385201.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6456 + ... + 6612.

It is an arithmetic number, because the mean of its divisors is an integer number (52535).

2^1025838 is an apocalyptic number.

1025838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1025838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1260840).

1025838 is an abundant number, since it is smaller than the sum of its proper divisors (1495842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1025838 is a wasteful number, since it uses less digits than its factorization.

1025838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1025838 is about 1012.8366107127. The cubic root of 1025838 is about 100.8539535423.

It can be divided in two parts, 10258 and 38, that added together give a triangular number (10296 = T₁₄₃).

The spelling of 1025838 in words is "one million, twenty-five thousand, eight hundred thirty-eight".