840848261 has 4 divisors (see below), whose sum is σ = 917289024. Its totient is φ = 764407500.

The previous prime is 840848251. The next prime is 840848279. The reversal of 840848261 is 162848048.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840848261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840848201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38220365 + ... + 38220386.

It is an arithmetic number, because the mean of its divisors is an integer number (229322256).

Almost surely, 2^840848261 is an apocalyptic number.

It is an amenable number.

840848261 is a deficient number, since it is larger than the sum of its proper divisors (76440763).

840848261 is a wasteful number, since it uses less digits than its factorization.

840848261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76440762.

The product of its (nonzero) digits is 98304, while the sum is 41.

The square root of 840848261 is about 28997.3836923265. The cubic root of 840848261 is about 943.8562952303.

The spelling of 840848261 in words is "eight hundred forty million, eight hundred forty-eight thousand, two hundred sixty-one".