840917425 has 6 divisors (see below), whose sum is σ = 1042737638. Its totient is φ = 672733920.

The previous prime is 840917327. The next prime is 840917443. The reversal of 840917425 is 524719048.

840917425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 5071504 + 835845921 = 2252^2 + 28911^2 .

It is not a de Polignac number, because 840917425 - 2¹⁹ = 840393137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16818324 + ... + 16818373.

Almost surely, 2^840917425 is an apocalyptic number.

It is an amenable number.

840917425 is a deficient number, since it is larger than the sum of its proper divisors (201820213).

840917425 is a wasteful number, since it uses less digits than its factorization.

840917425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33636707 (or 33636702 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 840917425 is about 28998.5762581545. The cubic root of 840917425 is about 943.8821734972.

The spelling of 840917425 in words is "eight hundred forty million, nine hundred seventeen thousand, four hundred twenty-five".