1325816775 has 24 divisors (see below), whose sum is σ = 2435575760. Its totient is φ = 707101920.

The previous prime is 1325816747. The next prime is 1325816831. The reversal of 1325816775 is 5776185231.

It is a happy number.

1325816775 is a `hidden beast` number, since 1 + 3 + 2 + 581 + 67 + 7 + 5 = 666.

It is not a de Polignac number, because 1325816775 - 2⁵ = 1325816743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1325816775.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 981412 + ... + 982761.

Almost surely, 2^1325816775 is an apocalyptic number.

1325816775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1325816775 is a deficient number, since it is larger than the sum of its proper divisors (1109758985).

1325816775 is a wasteful number, since it uses less digits than its factorization.

1325816775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964192 (or 1964181 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 1325816775 is about 36411.7669854128. The cubic root of 1325816775 is about 1098.5702567978.

The spelling of 1325816775 in words is "one billion, three hundred twenty-five million, eight hundred sixteen thousand, seven hundred seventy-five".