978342 has 24 divisors (see below), whose sum is σ = 2026248. Its totient is φ = 314880.

The previous prime is 978337. The next prime is 978343. The reversal of 978342 is 243879.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10038 + ... + 10134.

It is an arithmetic number, because the mean of its divisors is an integer number (84427).

2⁹⁷⁸³⁴² is an apocalyptic number.

978342 is an abundant number, since it is smaller than the sum of its proper divisors (1047906).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

978342 is a wasteful number, since it uses less digits than its factorization.

978342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 143 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 978342 is about 989.1117227088. Note that the first 3 decimals coincide. The cubic root of 978342 is about 99.2727911587.

Adding to 978342 its reverse (243879), we get a palindrome (1222221).

It can be divided in two parts, 9 and 78342, that multiplied together give a triangular number (705078 = T₁₁₈₇).

The spelling of 978342 in words is "nine hundred seventy-eight thousand, three hundred forty-two".