1201601056 has 24 divisors (see below), whose sum is σ = 2370225564. Its totient is φ = 599639040.

The previous prime is 1201601047. The next prime is 1201601081. The reversal of 1201601056 is 6501061021.

It can be written as a sum of positive squares in 2 ways, for example, as 1163901456 + 37699600 = 34116^2 + 6140^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19365 + ... + 52708.

Almost surely, 2^1201601056 is an apocalyptic number.

1201601056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1201601056 is a deficient number, since it is larger than the sum of its proper divisors (1168624508).

1201601056 is an equidigital number, since it uses as much as digits as its factorization.

1201601056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72604 (or 72596 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 1201601056 is about 34664.1177011618. The cubic root of 1201601056 is about 1063.1309635638.

Adding to 1201601056 its reverse (6501061021), we get a palindrome (7702662077).

The spelling of 1201601056 in words is "one billion, two hundred one million, six hundred one thousand, fifty-six".