1302306661 has 8 divisors (see below), whose sum is σ = 1306650744. Its totient is φ = 1297970880.

The previous prime is 1302306653. The next prime is 1302306673. The reversal of 1302306661 is 1666032031.

It can be written as a sum of positive squares in 4 ways, for example, as 65448100 + 1236858561 = 8090^2 + 35169^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1302306661 - 2³ = 1302306653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1302306601) 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, 473751 + ... + 476491.

It is an arithmetic number, because the mean of its divisors is an integer number (163331343).

Almost surely, 2^1302306661 is an apocalyptic number.

It is an amenable number.

1302306661 is a deficient number, since it is larger than the sum of its proper divisors (4344083).

1302306661 is an equidigital number, since it uses as much as digits as its factorization.

1302306661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4151.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 1302306661 is about 36087.4862105966. The cubic root of 1302306661 is about 1092.0380076512.

Adding to 1302306661 its reverse (1666032031), we get a palindrome (2968338692).

The spelling of 1302306661 in words is "one billion, three hundred two million, three hundred six thousand, six hundred sixty-one".