1005235513 has 4 divisors (see below), whose sum is σ = 1005374068. Its totient is φ = 1005096960.

The previous prime is 1005235501. The next prime is 1005235529. The reversal of 1005235513 is 3155325001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 270174969 + 735060544 = 16437^2 + 27112^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1005235513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1005535513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57756 + ... + 73117.

It is an arithmetic number, because the mean of its divisors is an integer number (251343517).

Almost surely, 2^1005235513 is an apocalyptic number.

It is an amenable number.

1005235513 is a deficient number, since it is larger than the sum of its proper divisors (138555).

1005235513 is an equidigital number, since it uses as much as digits as its factorization.

1005235513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138554.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 1005235513 is about 31705.4492634941. The cubic root of 1005235513 is about 1001.7421342059.

The spelling of 1005235513 in words is "one billion, five million, two hundred thirty-five thousand, five hundred thirteen".