1320555201 has 8 divisors (see below), whose sum is σ = 2012274624. Its totient is φ = 754602960.

The previous prime is 1320555167. The next prime is 1320555209. The reversal of 1320555201 is 1025550231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1320555201 - 2¹³ = 1320547009 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1320555209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31441770 + ... + 31441811.

It is an arithmetic number, because the mean of its divisors is an integer number (251534328).

Almost surely, 2^1320555201 is an apocalyptic number.

It is an amenable number.

1320555201 is a deficient number, since it is larger than the sum of its proper divisors (691719423).

1320555201 is an equidigital number, since it uses as much as digits as its factorization.

1320555201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62883591.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 1320555201 is about 36339.4441481980. Note that the first 3 decimals coincide. The cubic root of 1320555201 is about 1097.1150853978.

The spelling of 1320555201 in words is "one billion, three hundred twenty million, five hundred fifty-five thousand, two hundred one".