842491 has 8 divisors (see below), whose sum is σ = 914480. Its totient is φ = 771552.

The previous prime is 842489. The next prime is 842497. The reversal of 842491 is 194248.

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 842491 - 2¹ = 842489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (842497) 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, 2836 + ... + 3118.

It is an arithmetic number, because the mean of its divisors is an integer number (114310).

2⁸⁴²⁴⁹¹ is an apocalyptic number.

842491 is a deficient number, since it is larger than the sum of its proper divisors (71989).

842491 is a wasteful number, since it uses less digits than its factorization.

842491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525.

The product of its digits is 2304, while the sum is 28.

The square root of 842491 is about 917.8730849088. The cubic root of 842491 is about 94.4470556243.

It can be divided in two parts, 8424 and 91, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 842491 in words is "eight hundred forty-two thousand, four hundred ninety-one".