1004545978 has 4 divisors (see below), whose sum is σ = 1506818970. Its totient is φ = 502272988.

The previous prime is 1004545921. The next prime is 1004545981. The reversal of 1004545978 is 8795454001.

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., 750047769 + 254498209 = 27387^2 + 15953^2 .

It is a super-2 number, since 2×1004545978² = 2018225243831952968, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251136493 + ... + 251136496.

Almost surely, 2^1004545978 is an apocalyptic number.

1004545978 is a deficient number, since it is larger than the sum of its proper divisors (502272992).

1004545978 is an equidigital number, since it uses as much as digits as its factorization.

1004545978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502272991.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 1004545978 is about 31694.5733209961. The cubic root of 1004545978 is about 1001.5130355688.

Adding to 1004545978 its reverse (8795454001), we get a palindrome (9799999979).

The spelling of 1004545978 in words is "one billion, four million, five hundred forty-five thousand, nine hundred seventy-eight".