1201315320 has 128 divisors (see below), whose sum is σ = 4013582400. Its totient is φ = 319615488.

The previous prime is 1201315307. The next prime is 1201315321. The reversal of 1201315320 is 235131021.

1201315320 is a `hidden beast` number, since 1 + 2 + 0 + 131 + 532 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1201315293 and 1201315302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201315321) 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, 600562 + ... + 602558.

Almost surely, 2^1201315320 is an apocalyptic number.

1201315320 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 1201315320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2006791200).

1201315320 is an abundant number, since it is smaller than the sum of its proper divisors (2812267080).

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

1201315320 is a wasteful number, since it uses less digits than its factorization.

1201315320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2574 (or 2564 counting only the distinct ones).

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

The square root of 1201315320 is about 34659.9959607614. The cubic root of 1201315320 is about 1063.0466874309.

Adding to 1201315320 its reverse (235131021), we get a palindrome (1436446341).

The spelling of 1201315320 in words is "one billion, two hundred one million, three hundred fifteen thousand, three hundred twenty".