842761 has 4 divisors (see below), whose sum is σ = 846612. Its totient is φ = 838912.

The previous prime is 842759. The next prime is 842767. The reversal of 842761 is 167248.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59536 + 783225 = 244^2 + 885^2 .

It is a cyclic number.

It is not a de Polignac number, because 842761 - 2¹ = 842759 is a prime.

It is a super-2 number, since 2×842761² = 1420492206242, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (842767) 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, 1576 + ... + 2041.

It is an arithmetic number, because the mean of its divisors is an integer number (211653).

2⁸⁴²⁷⁶¹ is an apocalyptic number.

It is an amenable number.

842761 is a deficient number, since it is larger than the sum of its proper divisors (3851).

842761 is a wasteful number, since it uses less digits than its factorization.

842761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3850.

The product of its digits is 2688, while the sum is 28.

The square root of 842761 is about 918.0201522843. The cubic root of 842761 is about 94.4571439542.

The spelling of 842761 in words is "eight hundred forty-two thousand, seven hundred sixty-one".