1025444 has 24 divisors (see below), whose sum is σ = 2092608. Its totient is φ = 430560.

The previous prime is 1025443. The next prime is 1025459. The reversal of 1025444 is 4445201.

It is not an unprimeable number, because it can be changed into a prime (1025443) 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 7 ways as a sum of consecutive naturals, for example, 1139 + ... + 1829.

It is an arithmetic number, because the mean of its divisors is an integer number (87192).

2^1025444 is an apocalyptic number.

1025444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1025444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1046304).

1025444 is an abundant number, since it is smaller than the sum of its proper divisors (1067164).

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

1025444 is a wasteful number, since it uses less digits than its factorization.

1025444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755 (or 753 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1025444 is about 1012.6420887954. The cubic root of 1025444 is about 100.8410400199.

The spelling of 1025444 in words is "one million, twenty-five thousand, four hundred forty-four".