1200661164 has 48 divisors (see below), whose sum is σ = 3124387840. Its totient is φ = 398733840.

The previous prime is 1200661141. The next prime is 1200661169. The reversal of 1200661164 is 4611660021.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1200661169) 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 15 ways as a sum of consecutive naturals, for example, 8757 + ... + 49779.

Almost surely, 2^1200661164 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 1200661164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1562193920).

1200661164 is an abundant number, since it is smaller than the sum of its proper divisors (1923726676).

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

1200661164 is a wasteful number, since it uses less digits than its factorization.

1200661164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41307 (or 41299 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1200661164 is about 34650.5579175863. The cubic root of 1200661164 is about 1062.8536976810.

The spelling of 1200661164 in words is "one billion, two hundred million, six hundred sixty-one thousand, one hundred sixty-four".