1301628065 has 16 divisors (see below), whose sum is σ = 1589131920. Its totient is φ = 1023217920.

The previous prime is 1301628059. The next prime is 1301628067. The reversal of 1301628065 is 5608261031.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 189805729 + 1111822336 = 13777^2 + 33344^2 .

It is not a de Polignac number, because 1301628065 - 2⁴ = 1301628049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1301628067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 507767 + ... + 510323.

It is an arithmetic number, because the mean of its divisors is an integer number (99320745).

Almost surely, 2^1301628065 is an apocalyptic number.

It is an amenable number.

1301628065 is a deficient number, since it is larger than the sum of its proper divisors (287503855).

1301628065 is a wasteful number, since it uses less digits than its factorization.

1301628065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4292.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1301628065 is about 36078.0828897545. The cubic root of 1301628065 is about 1091.8482977574.

Adding to 1301628065 its reverse (5608261031), we get a palindrome (6909889096).

The spelling of 1301628065 in words is "one billion, three hundred one million, six hundred twenty-eight thousand, sixty-five".