1201158720 has 392 divisors, whose sum is σ = 4530791040. Its totient is φ = 302330880.

The previous prime is 1201158719. The next prime is 1201158733. The reversal of 1201158720 is 278511021.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 4432185 + ... + 4432455.

Almost surely, 2^1201158720 is an apocalyptic number.

1201158720 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 1201158720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2265395520).

1201158720 is an abundant number, since it is smaller than the sum of its proper divisors (3329632320).

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

1201158720 is an equidigital number, since it uses as much as digits as its factorization.

1201158720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 1201158720 is about 34657.7367985851. The cubic root of 1201158720 is about 1063.0004935236. Note that the first 3 decimals are identical.

Adding to 1201158720 its reverse (278511021), we get a palindrome (1479669741).

The spelling of 1201158720 in words is "one billion, two hundred one million, one hundred fifty-eight thousand, seven hundred twenty".