1320936481 has 4 divisors (see below), whose sum is σ = 1321009200. Its totient is φ = 1320863764.

The previous prime is 1320936389. The next prime is 1320936521. The reversal of 1320936481 is 1846390231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1320936481 - 2¹³ = 1320928289 is a prime.

It is a super-2 number, since 2×1320936481² = 3489746373673326722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320936481.

It is not an unprimeable number, because it can be changed into a prime (1320906481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16650 + ... + 54028.

It is an arithmetic number, because the mean of its divisors is an integer number (330252300).

Almost surely, 2^1320936481 is an apocalyptic number.

It is an amenable number.

1320936481 is a deficient number, since it is larger than the sum of its proper divisors (72719).

1320936481 is an equidigital number, since it uses as much as digits as its factorization.

1320936481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72718.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 1320936481 is about 36344.6898597305. The cubic root of 1320936481 is about 1097.2206641692.

The spelling of 1320936481 in words is "one billion, three hundred twenty million, nine hundred thirty-six thousand, four hundred eighty-one".