1321057160 has 16 divisors (see below), whose sum is σ = 2972378700. Its totient is φ = 528422848.

The previous prime is 1321057121. The next prime is 1321057193. The reversal of 1321057160 is 617501231.

It can be written as a sum of positive squares in 2 ways, for example, as 1288953604 + 32103556 = 35902^2 + 5666^2 .

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, 16513175 + ... + 16513254.

Almost surely, 2^1321057160 is an apocalyptic number.

1321057160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321057160 is an abundant number, since it is smaller than the sum of its proper divisors (1651321540).

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

1321057160 is a wasteful number, since it uses less digits than its factorization.

1321057160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33026440 (or 33026436 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 1321057160 is about 36346.3500230766. The cubic root of 1321057160 is about 1097.2540766919.

Adding to 1321057160 its reverse (617501231), we get a palindrome (1938558391).

The spelling of 1321057160 in words is "one billion, three hundred twenty-one million, fifty-seven thousand, one hundred sixty".