978122 has 4 divisors (see below), whose sum is σ = 1467186. Its totient is φ = 489060.

The previous prime is 978113. The next prime is 978149. The reversal of 978122 is 221879.

It is a happy number.

It is a Cunningham number, because it is equal to 989²+1.

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

It can be written as a sum of positive squares in only one way, i.e., 978121 + 1 = 989^2 + 1^2 .

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 978122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244529 + ... + 244532.

978122 is a Friedman number, since it can be written as (982+7)^2+1, using all its digits and the basic arithmetic operations.

2⁹⁷⁸¹²² is an apocalyptic number.

978122 is a deficient number, since it is larger than the sum of its proper divisors (489064).

978122 is a wasteful number, since it uses less digits than its factorization.

978122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489063.

The product of its digits is 2016, while the sum is 29.

The square root of 978122 is about 989.0005055610. Note that the first 3 decimals coincide. The cubic root of 978122 is about 99.2653494355.

It can be divided in two parts, 978 and 122, that multiplied together give a triangular number (119316 = T₄₈₈).

The spelling of 978122 in words is "nine hundred seventy-eight thousand, one hundred twenty-two".