1299591216 has 280 divisors, whose sum is σ = 4710008064. Its totient is φ = 337322880.

The previous prime is 1299591211. The next prime is 1299591229. The reversal of 1299591216 is 6121959921.

It is not an unprimeable number, because it can be changed into a prime (1299591211) by changing a digit.

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 55 ways as a sum of consecutive naturals, for example, 897405 + ... + 898851.

Almost surely, 2^1299591216 is an apocalyptic number.

1299591216 is a gapful number since it is divisible by the number (16) 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 1299591216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2355004032).

1299591216 is an abundant number, since it is smaller than the sum of its proper divisors (3410416848).

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

1299591216 is a wasteful number, since it uses less digits than its factorization.

1299591216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491 (or 1470 counting only the distinct ones).

The product of its digits is 87480, while the sum is 45.

The square root of 1299591216 is about 36049.8434948059. The cubic root of 1299591216 is about 1091.2784751843.

The spelling of 1299591216 in words is "one billion, two hundred ninety-nine million, five hundred ninety-one thousand, two hundred sixteen".