1320126965 has 4 divisors (see below), whose sum is σ = 1584152364. Its totient is φ = 1056101568.

The previous prime is 1320126953. The next prime is 1320126967. The reversal of 1320126965 is 5696210231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1045164241 + 274962724 = 32329^2 + 16582^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320126965 - 2⁴ = 1320126949 is a prime.

It is a super-2 number, since 2×1320126965² = 3485470407440222450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320126967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132012692 + ... + 132012701.

It is an arithmetic number, because the mean of its divisors is an integer number (396038091).

Almost surely, 2^1320126965 is an apocalyptic number.

It is an amenable number.

1320126965 is a deficient number, since it is larger than the sum of its proper divisors (264025399).

1320126965 is an equidigital number, since it uses as much as digits as its factorization.

1320126965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264025398.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 1320126965 is about 36333.5515054612. The cubic root of 1320126965 is about 1096.9964799884.

The spelling of 1320126965 in words is "one billion, three hundred twenty million, one hundred twenty-six thousand, nine hundred sixty-five".