1320101765 has 16 divisors (see below), whose sum is σ = 1689387840. Its totient is φ = 986799360.

The previous prime is 1320101759. The next prime is 1320101791. The reversal of 1320101765 is 5671010231.

It is not a de Polignac number, because 1320101765 - 2⁴ = 1320101749 is a prime.

It is a super-2 number, since 2×1320101765² = 3485337339912230450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44051 + ... + 67680.

It is an arithmetic number, because the mean of its divisors is an integer number (105586740).

Almost surely, 2^1320101765 is an apocalyptic number.

It is an amenable number.

1320101765 is a deficient number, since it is larger than the sum of its proper divisors (369286075).

1320101765 is a wasteful number, since it uses less digits than its factorization.

1320101765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111892.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 1320101765 is about 36333.2047168977. The cubic root of 1320101765 is about 1096.9894997287.

Adding to 1320101765 its reverse (5671010231), we get a palindrome (6991111996).

The spelling of 1320101765 in words is "one billion, three hundred twenty million, one hundred one thousand, seven hundred sixty-five".