840925 has 6 divisors (see below), whose sum is σ = 1042778. Its totient is φ = 672720.

The previous prime is 840923. The next prime is 840929. The reversal of 840925 is 529048.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 36 + 840889 = 6^2 + 917^2 .

It is not a de Polignac number, because 840925 - 2¹ = 840923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 840893 and 840902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16794 + ... + 16843.

2⁸⁴⁰⁹²⁵ is an apocalyptic number.

It is an amenable number.

840925 is a deficient number, since it is larger than the sum of its proper divisors (201853).

840925 is a wasteful number, since it uses less digits than its factorization.

840925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33647 (or 33642 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 840925 is about 917.0196290156. The cubic root of 840925 is about 94.3885007658.

The spelling of 840925 in words is "eight hundred forty thousand, nine hundred twenty-five".