1201543320 has 64 divisors (see below), whose sum is σ = 3614584320. Its totient is φ = 319526784.

The previous prime is 1201543303. The next prime is 1201543349. The reversal of 1201543320 is 233451021.

It is a super-3 number, since 3×1201543320³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30399 + ... + 57681.

It is an arithmetic number, because the mean of its divisors is an integer number (56477880).

Almost surely, 2^1201543320 is an apocalyptic number.

1201543320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201543320 is an abundant number, since it is smaller than the sum of its proper divisors (2413041000).

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

1201543320 is a wasteful number, since it uses less digits than its factorization.

1201543320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27664 (or 27660 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1201543320 is about 34663.2848991552. The cubic root of 1201543320 is about 1063.1139357513.

Adding to 1201543320 its reverse (233451021), we get a palindrome (1434994341).

The spelling of 1201543320 in words is "one billion, two hundred one million, five hundred forty-three thousand, three hundred twenty".