1335128739 has 16 divisors (see below), whose sum is σ = 2100111360. Its totient is φ = 738319680.

The previous prime is 1335128723. The next prime is 1335128747. The reversal of 1335128739 is 9378215331.

1335128739 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1335128739 - 2⁴ = 1335128723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1335128739.

It is not an unprimeable number, because it can be changed into a prime (1335128719) 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, 1024794 + ... + 1026095.

It is an arithmetic number, because the mean of its divisors is an integer number (131256960).

Almost surely, 2^1335128739 is an apocalyptic number.

1335128739 is a deficient number, since it is larger than the sum of its proper divisors (764982621).

1335128739 is a wasteful number, since it uses less digits than its factorization.

1335128739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050930.

The product of its digits is 136080, while the sum is 42.

The square root of 1335128739 is about 36539.4135010402. The cubic root of 1335128739 is about 1101.1362196280.

The spelling of 1335128739 in words is "one billion, three hundred thirty-five million, one hundred twenty-eight thousand, seven hundred thirty-nine".