1325543805 has 64 divisors (see below), whose sum is σ = 2514758400. Its totient is φ = 660142080.

The previous prime is 1325543767. The next prime is 1325543809. The reversal of 1325543805 is 5083455231.

1325543805 is a `hidden beast` number, since 1 + 32 + 5 + 543 + 80 + 5 = 666.

It is not a de Polignac number, because 1325543805 - 2⁶ = 1325543741 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1325543805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325543809) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 298441 + ... + 302849.

It is an arithmetic number, because the mean of its divisors is an integer number (39293100).

Almost surely, 2^1325543805 is an apocalyptic number.

1325543805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1325543805 is a deficient number, since it is larger than the sum of its proper divisors (1189214595).

1325543805 is a wasteful number, since it uses less digits than its factorization.

1325543805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4571 (or 4565 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 1325543805 is about 36408.0184162775. The cubic root of 1325543805 is about 1098.4948574135.

The spelling of 1325543805 in words is "one billion, three hundred twenty-five million, five hundred forty-three thousand, eight hundred five".