1200681570 has 64 divisors (see below), whose sum is σ = 3162571776. Its totient is φ = 289318080.

The previous prime is 1200681551. The next prime is 1200681571. The reversal of 1200681570 is 751860021.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1200681571) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44217 + ... + 66003.

It is an arithmetic number, because the mean of its divisors is an integer number (49415184).

Almost surely, 2^1200681570 is an apocalyptic number.

1200681570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200681570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1581285888).

1200681570 is an abundant number, since it is smaller than the sum of its proper divisors (1961890206).

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

1200681570 is a wasteful number, since it uses less digits than its factorization.

1200681570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21975.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 1200681570 is about 34650.8523704685. The cubic root of 1200681570 is about 1062.8597189383.

The spelling of 1200681570 in words is "one billion, two hundred million, six hundred eighty-one thousand, five hundred seventy".