1230978 has 48 divisors (see below), whose sum is σ = 2954880. Its totient is φ = 340704.

The previous prime is 1230967. The next prime is 1230997. The reversal of 1230978 is 8790321.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15543 + ... + 15621.

It is an arithmetic number, because the mean of its divisors is an integer number (61560).

2^1230978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1230978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1477440).

1230978 is an abundant number, since it is smaller than the sum of its proper divisors (1723902).

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

1230978 is a wasteful number, since it uses less digits than its factorization.

1230978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 1230978 is about 1109.4944794815. The cubic root of 1230978 is about 107.1725169950.

The spelling of 1230978 in words is "one million, two hundred thirty thousand, nine hundred seventy-eight".