1020512135 has 16 divisors (see below), whose sum is σ = 1290211200. Its totient is φ = 772754976.

The previous prime is 1020512123. The next prime is 1020512137. The reversal of 1020512135 is 5312150201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1020512135 - 2⁸ = 1020511879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020512137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120056 + ... + 128274.

It is an arithmetic number, because the mean of its divisors is an integer number (80638200).

Almost surely, 2^1020512135 is an apocalyptic number.

1020512135 is a deficient number, since it is larger than the sum of its proper divisors (269699065).

1020512135 is a wasteful number, since it uses less digits than its factorization.

1020512135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9550.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1020512135 is about 31945.4556236094. The cubic root of 1020512135 is about 1006.7911541564.

Adding to 1020512135 its reverse (5312150201), we get a palindrome (6332662336).

The spelling of 1020512135 in words is "one billion, twenty million, five hundred twelve thousand, one hundred thirty-five".