1331306045 has 8 divisors (see below), whose sum is σ = 1652655960. Its totient is φ = 1028319040.

The previous prime is 1331306027. The next prime is 1331306047. The reversal of 1331306045 is 5406031331.

It can be written as a sum of positive squares in 4 ways, for example, as 370678009 + 960628036 = 19253^2 + 30994^2 .

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

It is not a de Polignac number, because 1331306045 - 2⁶ = 1331305981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331306047) 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, 4590566 + ... + 4590855.

It is an arithmetic number, because the mean of its divisors is an integer number (206581995).

Almost surely, 2^1331306045 is an apocalyptic number.

It is an amenable number.

1331306045 is a deficient number, since it is larger than the sum of its proper divisors (321349915).

1331306045 is an equidigital number, since it uses as much as digits as its factorization.

1331306045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9181455.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 1331306045 is about 36487.0668182577. The cubic root of 1331306045 is about 1100.0843034562.

Adding to 1331306045 its reverse (5406031331), we get a palindrome (6737337376).

The spelling of 1331306045 in words is "one billion, three hundred thirty-one million, three hundred six thousand, forty-five".