1025780 has 48 divisors (see below), whose sum is σ = 2612736. Its totient is φ = 330240.

The previous prime is 1025767. The next prime is 1025789. The reversal of 1025780 is 875201.

1025780 = T₁₃₅ + T₁₃₆ + ... + T₂₀₄.

1025780 is nontrivially palindromic in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025789) 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 15 ways as a sum of consecutive naturals, for example, 2165 + ... + 2595.

It is an arithmetic number, because the mean of its divisors is an integer number (54432).

2^1025780 is an apocalyptic number.

1025780 is a gapful number since it is divisible by the number (10) 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 1025780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1306368).

1025780 is an abundant number, since it is smaller than the sum of its proper divisors (1586956).

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

1025780 is a wasteful number, since it uses less digits than its factorization.

1025780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 1025780 is about 1012.8079778517. The cubic root of 1025780 is about 100.8520527745.

The spelling of 1025780 in words is "one million, twenty-five thousand, seven hundred eighty".