1004725553 has 4 divisors (see below), whose sum is σ = 1082012148. Its totient is φ = 927438960.

The previous prime is 1004725549. The next prime is 1004725559. The reversal of 1004725553 is 3555274001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3555274001 = 457 ⋅7779593.

It can be written as a sum of positive squares in 2 ways, for example, as 688170289 + 316555264 = 26233^2 + 17792^2 .

It is a cyclic number.

It is not a de Polignac number, because 1004725553 - 2² = 1004725549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1004725559) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 38643278 + ... + 38643303.

It is an arithmetic number, because the mean of its divisors is an integer number (270503037).

Almost surely, 2^1004725553 is an apocalyptic number.

1004725553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1004725553 is a deficient number, since it is larger than the sum of its proper divisors (77286595).

1004725553 is an equidigital number, since it uses as much as digits as its factorization.

1004725553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77286594.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 1004725553 is about 31697.4060926127. The cubic root of 1004725553 is about 1001.5727096211.

Adding to 1004725553 its reverse (3555274001), we get a palindrome (4559999554).

The spelling of 1004725553 in words is "one billion, four million, seven hundred twenty-five thousand, five hundred fifty-three".