840525 has 24 divisors (see below), whose sum is σ = 1589184. Its totient is φ = 384000.

The previous prime is 840523. The next prime is 840547. The reversal of 840525 is 525048.

It is not a de Polignac number, because 840525 - 2¹ = 840523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 840495 and 840504.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 840525.

It is not an unprimeable number, because it can be changed into a prime (840523) 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 23 ways as a sum of consecutive naturals, for example, 276 + ... + 1325.

It is an arithmetic number, because the mean of its divisors is an integer number (66216).

2⁸⁴⁰⁵²⁵ is an apocalyptic number.

It is an amenable number.

840525 is a deficient number, since it is larger than the sum of its proper divisors (748659).

840525 is a wasteful number, since it uses less digits than its factorization.

840525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621 (or 1616 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 840525 is about 916.8015052344. The cubic root of 840525 is about 94.3735325708.

The spelling of 840525 in words is "eight hundred forty thousand, five hundred twenty-five".