1025520 has 40 divisors (see below), whose sum is σ = 3179856. Its totient is φ = 273408.

The previous prime is 1025513. The next prime is 1025537. The reversal of 1025520 is 255201.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 1025520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1897 + ... + 2376.

2^1025520 is an apocalyptic number.

1025520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1025520 is an abundant number, since it is smaller than the sum of its proper divisors (2154336).

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

1025520 is a wasteful number, since it uses less digits than its factorization.

1025520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289 (or 4283 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 1025520 is about 1012.6796136982. The cubic root of 1025520 is about 100.8435312106.

The spelling of 1025520 in words is "one million, twenty-five thousand, five hundred twenty".