1026640135 has 4 divisors (see below), whose sum is σ = 1231968168. Its totient is φ = 821312104.

The previous prime is 1026640117. The next prime is 1026640151. The reversal of 1026640135 is 5310466201.

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 1026640135 - 2⁵ = 1026640103 is a prime.

It is a super-3 number, since 3×1026640135³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102664009 + ... + 102664018.

It is an arithmetic number, because the mean of its divisors is an integer number (307992042).

Almost surely, 2^1026640135 is an apocalyptic number.

1026640135 is a deficient number, since it is larger than the sum of its proper divisors (205328033).

1026640135 is an equidigital number, since it uses as much as digits as its factorization.

1026640135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205328032.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1026640135 is about 32041.2255539641. The cubic root of 1026640135 is about 1008.8023365332.

The spelling of 1026640135 in words is "one billion, twenty-six million, six hundred forty thousand, one hundred thirty-five".