840261 has 8 divisors (see below), whose sum is σ = 1127520. Its totient is φ = 556592.

The previous prime is 840253. The next prime is 840269. The reversal of 840261 is 162048.

It is an interprime number because it is at equal distance from previous prime (840253) and next prime (840269).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 840261 - 2³ = 840253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291 + ... + 1328.

It is an arithmetic number, because the mean of its divisors is an integer number (140940).

2⁸⁴⁰²⁶¹ is an apocalyptic number.

It is an amenable number.

840261 is a deficient number, since it is larger than the sum of its proper divisors (287259).

840261 is a wasteful number, since it uses less digits than its factorization.

840261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 840261 is about 916.6575151058. The cubic root of 840261 is about 94.3636509605.

The spelling of 840261 in words is "eight hundred forty thousand, two hundred sixty-one".