1000520135 has 4 divisors (see below), whose sum is σ = 1200624168. Its totient is φ = 800416104.

The previous prime is 1000520113. The next prime is 1000520137. The reversal of 1000520135 is 5310250001.

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

It is a cyclic number.

It is not a de Polignac number, because 1000520135 - 2¹² = 1000516039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000520137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100052009 + ... + 100052018.

It is an arithmetic number, because the mean of its divisors is an integer number (300156042).

Almost surely, 2^1000520135 is an apocalyptic number.

1000520135 is a deficient number, since it is larger than the sum of its proper divisors (200104033).

1000520135 is an equidigital number, since it uses as much as digits as its factorization.

1000520135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200104032.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 1000520135 is about 31630.9995890108. Note that the first 3 decimals coincide. The cubic root of 1000520135 is about 1000.1733482820.

Adding to 1000520135 its reverse (5310250001), we get a palindrome (6310770136).

The spelling of 1000520135 in words is "one billion, five hundred twenty thousand, one hundred thirty-five".