842931 has 12 divisors (see below), whose sum is σ = 1235208. Its totient is φ = 553824.

The previous prime is 842923. The next prime is 842939. The reversal of 842931 is 139248.

842931 = T₁₁₄ + T₁₁₅ + ... + T₁₈₆.

It is an interprime number because it is at equal distance from previous prime (842923) and next prime (842939).

It is not a de Polignac number, because 842931 - 2³ = 842923 is a prime.

It is a super-2 number, since 2×842931² = 1421065341522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

842931 is a lucky number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 842895 and 842904.

It is not an unprimeable number, because it can be changed into a prime (842939) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16 + ... + 1298.

It is an arithmetic number, because the mean of its divisors is an integer number (102934).

2⁸⁴²⁹³¹ is an apocalyptic number.

842931 is a deficient number, since it is larger than the sum of its proper divisors (392277).

842931 is a wasteful number, since it uses less digits than its factorization.

842931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362 (or 1359 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 842931 is about 918.1127381754. The cubic root of 842931 is about 94.4634947602.

The spelling of 842931 in words is "eight hundred forty-two thousand, nine hundred thirty-one".