1020423135 has 16 divisors (see below), whose sum is σ = 1634300640. Its totient is φ = 543684480.

The previous prime is 1020423121. The next prime is 1020423137. The reversal of 1020423135 is 5313240201.

It is not a de Polignac number, because 1020423135 - 2⁷ = 1020423007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020423137) 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, 18000 + ... + 48629.

It is an arithmetic number, because the mean of its divisors is an integer number (102143790).

Almost surely, 2^1020423135 is an apocalyptic number.

1020423135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1020423135 is a deficient number, since it is larger than the sum of its proper divisors (613877505).

1020423135 is a wasteful number, since it uses less digits than its factorization.

1020423135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67658.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1020423135 is about 31944.0625938530. The cubic root of 1020423135 is about 1006.7618855129.

Adding to 1020423135 its reverse (5313240201), we get a palindrome (6333663336).

The spelling of 1020423135 in words is "one billion, twenty million, four hundred twenty-three thousand, one hundred thirty-five".