1200551280 has 160 divisors (see below), whose sum is σ = 3875376960. Its totient is φ = 307077120.

The previous prime is 1200551257. The next prime is 1200551333. The reversal of 1200551280 is 821550021.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1200551280.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1259284 + ... + 1260236.

It is an arithmetic number, because the mean of its divisors is an integer number (24221106).

Almost surely, 2^1200551280 is an apocalyptic number.

1200551280 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 1200551280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1937688480).

1200551280 is an abundant number, since it is smaller than the sum of its proper divisors (2674825680).

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

1200551280 is a wasteful number, since it uses less digits than its factorization.

1200551280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179 (or 1173 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 1200551280 is about 34648.9722791312. The cubic root of 1200551280 is about 1062.8212727187.

The spelling of 1200551280 in words is "one billion, two hundred million, five hundred fifty-one thousand, two hundred eighty".