1325820669 has 8 divisors (see below), whose sum is σ = 1789059552. Its totient is φ = 873231120.

The previous prime is 1325820659. The next prime is 1325820689. The reversal of 1325820669 is 9660285231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1325820669 - 2⁸ = 1325820413 is a prime.

It is a super-2 number, since 2×1325820669² = 3515600892695215122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1325820669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325820659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2662042 + ... + 2662539.

It is an arithmetic number, because the mean of its divisors is an integer number (223632444).

Almost surely, 2^1325820669 is an apocalyptic number.

It is an amenable number.

1325820669 is a deficient number, since it is larger than the sum of its proper divisors (463238883).

1325820669 is an equidigital number, since it uses as much as digits as its factorization.

1325820669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5324667.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 1325820669 is about 36411.8204570988. The cubic root of 1325820669 is about 1098.5713323181.

The spelling of 1325820669 in words is "one billion, three hundred twenty-five million, eight hundred twenty thousand, six hundred sixty-nine".