1005420004 has 6 divisors (see below), whose sum is σ = 1759485014. Its totient is φ = 502710000.

The previous prime is 1005419983. The next prime is 1005420019. The reversal of 1005420004 is 4000245001.

It can be written as a sum of positive squares in only one way, i.e., 571114404 + 434305600 = 23898^2 + 20840^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1005420004.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125677497 + ... + 125677504.

Almost surely, 2^1005420004 is an apocalyptic number.

It is an amenable number.

1005420004 is a deficient number, since it is larger than the sum of its proper divisors (754065010).

1005420004 is a wasteful number, since it uses less digits than its factorization.

1005420004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251355005 (or 251355003 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 1005420004 is about 31708.3585825567. The cubic root of 1005420004 is about 1001.8034137438.

Adding to 1005420004 its reverse (4000245001), we get a palindrome (5005665005).

The spelling of 1005420004 in words is "one billion, five million, four hundred twenty thousand, four".