1328665525 has 24 divisors (see below), whose sum is σ = 1802545344. Its totient is φ = 963494400.

The previous prime is 1328665517. The next prime is 1328665553. The reversal of 1328665525 is 5255668231.

It is not a de Polignac number, because 1328665525 - 2³ = 1328665517 is a prime.

It is a super-3 number, since 3×1328665525³ (a number of 28 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

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 23 ways as a sum of consecutive naturals, for example, 90232 + ... + 103918.

It is an arithmetic number, because the mean of its divisors is an integer number (75106056).

Almost surely, 2^1328665525 is an apocalyptic number.

It is an amenable number.

1328665525 is a deficient number, since it is larger than the sum of its proper divisors (473879819).

1328665525 is a wasteful number, since it uses less digits than its factorization.

1328665525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14061 (or 14056 counting only the distinct ones).

The product of its digits is 432000, while the sum is 43.

The square root of 1328665525 is about 36450.8645302138. The cubic root of 1328665525 is about 1099.3565175859.

The spelling of 1328665525 in words is "one billion, three hundred twenty-eight million, six hundred sixty-five thousand, five hundred twenty-five".