1204978 has 4 divisors (see below), whose sum is σ = 1807470. Its totient is φ = 602488.

The previous prime is 1204969. The next prime is 1204981. The reversal of 1204978 is 8794021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8794021 = 347 ⋅25343.

It can be written as a sum of positive squares in only one way, i.e., 1181569 + 23409 = 1087^2 + 153^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 301243 + ... + 301246.

2^1204978 is an apocalyptic number.

1204978 is a deficient number, since it is larger than the sum of its proper divisors (602492).

1204978 is an equidigital number, since it uses as much as digits as its factorization.

1204978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602491.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1204978 is about 1097.7148992339. The cubic root of 1204978 is about 106.4125962625.

Adding to 1204978 its reverse (8794021), we get a palindrome (9998999).

The spelling of 1204978 in words is "one million, two hundred four thousand, nine hundred seventy-eight".