1280525 has 24 divisors (see below), whose sum is σ = 1767744. Its totient is φ = 915200.

The previous prime is 1280519. The next prime is 1280537. The reversal of 1280525 is 5250821.

It is a de Polignac number, because none of the positive numbers 2^k-1280525 is a prime.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1280525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9710 + ... + 9840.

It is an arithmetic number, because the mean of its divisors is an integer number (73656).

2^1280525 is an apocalyptic number.

It is an amenable number.

1280525 is a deficient number, since it is larger than the sum of its proper divisors (487219).

1280525 is a wasteful number, since it uses less digits than its factorization.

1280525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1280525 is about 1131.6028455249. The cubic root of 1280525 is about 108.5915471061.

The spelling of 1280525 in words is "one million, two hundred eighty thousand, five hundred twenty-five".