1200005316 has 72 divisors (see below), whose sum is σ = 3280193280. Its totient is φ = 368453376.

The previous prime is 1200005267. The next prime is 1200005327. The reversal of 1200005316 is 6135000021.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7905 + ... + 49623.

It is an arithmetic number, because the mean of its divisors is an integer number (45558240).

Almost surely, 2^1200005316 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200005316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1640096640).

1200005316 is an abundant number, since it is smaller than the sum of its proper divisors (2080187964).

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

1200005316 is a wasteful number, since it uses less digits than its factorization.

1200005316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41793 (or 41788 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 1200005316 is about 34641.0928811433. The cubic root of 1200005316 is about 1062.6601383728.

Adding to 1200005316 its reverse (6135000021), we get a palindrome (7335005337).

It can be divided in two parts, 120000 and 5316, that added together give a square (125316 = 354²).

The spelling of 1200005316 in words is "one billion, two hundred million, five thousand, three hundred sixteen".