1327020645 has 32 divisors (see below), whose sum is σ = 2159672832. Its totient is φ = 695665152.

The previous prime is 1327020641. The next prime is 1327020679. The reversal of 1327020645 is 5460207231.

It is not a de Polignac number, because 1327020645 - 2² = 1327020641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1327020641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 345204 + ... + 349026.

It is an arithmetic number, because the mean of its divisors is an integer number (67489776).

Almost surely, 2^1327020645 is an apocalyptic number.

1327020645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1327020645 is a deficient number, since it is larger than the sum of its proper divisors (832652187).

1327020645 is a wasteful number, since it uses less digits than its factorization.

1327020645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4221.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 1327020645 is about 36428.2945661748. The cubic root of 1327020645 is about 1098.9026646400.

Adding to 1327020645 its reverse (5460207231), we get a palindrome (6787227876).

The spelling of 1327020645 in words is "one billion, three hundred twenty-seven million, twenty thousand, six hundred forty-five".