1299621120 has 216 divisors, whose sum is σ = 4829023584. Its totient is φ = 297013248.

The previous prime is 1299621119. The next prime is 1299621161. The reversal of 1299621120 is 211269921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 184707 + ... + 191613.

Almost surely, 2^1299621120 is an apocalyptic number.

1299621120 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 1299621120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2414511792).

1299621120 is an abundant number, since it is smaller than the sum of its proper divisors (3529402464).

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

1299621120 is an equidigital number, since it uses as much as digits as its factorization.

1299621120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6945 (or 6924 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 1299621120 is about 36050.2582515022. The cubic root of 1299621120 is about 1091.2868453396.

The spelling of 1299621120 in words is "one billion, two hundred ninety-nine million, six hundred twenty-one thousand, one hundred twenty".