1325299820 has 48 divisors (see below), whose sum is σ = 3017155008. Its totient is φ = 486086400.

The previous prime is 1325299819. The next prime is 1325299823. The reversal of 1325299820 is 289925231.

It is a super-2 number, since 2×1325299820² = 3512839225784064800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1325299823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22382 + ... + 56138.

It is an arithmetic number, because the mean of its divisors is an integer number (62857396).

Almost surely, 2^1325299820 is an apocalyptic number.

1325299820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1325299820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1508577504).

1325299820 is an abundant number, since it is smaller than the sum of its proper divisors (1691855188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1325299820 is a wasteful number, since it uses less digits than its factorization.

1325299820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33930 (or 33928 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 1325299820 is about 36404.6675578833. The cubic root of 1325299820 is about 1098.4274554631.

The spelling of 1325299820 in words is "one billion, three hundred twenty-five million, two hundred ninety-nine thousand, eight hundred twenty".