1320774731 has 8 divisors (see below), whose sum is σ = 1341512928. Its totient is φ = 1300096000.

The previous prime is 1320774703. The next prime is 1320774739. The reversal of 1320774731 is 1374770231.

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 1320774731 - 2¹⁴ = 1320758347 is a prime.

It is a super-2 number, since 2×1320774731² = 3488891780096244722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320774691 and 1320774700.

It is not an unprimeable number, because it can be changed into a prime (1320774739) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 31001 + ... + 60021.

It is an arithmetic number, because the mean of its divisors is an integer number (167689116).

Almost surely, 2^1320774731 is an apocalyptic number.

1320774731 is a deficient number, since it is larger than the sum of its proper divisors (20738197).

1320774731 is an equidigital number, since it uses as much as digits as its factorization.

1320774731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29733.

The product of its (nonzero) digits is 24696, while the sum is 35.

The square root of 1320774731 is about 36342.4645697014. The cubic root of 1320774731 is about 1097.1758770833.

The spelling of 1320774731 in words is "one billion, three hundred twenty million, seven hundred seventy-four thousand, seven hundred thirty-one".