1320405374 has 4 divisors (see below), whose sum is σ = 1980608064. Its totient is φ = 660202686.

The previous prime is 1320405353. The next prime is 1320405391. The reversal of 1320405374 is 4735040231.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 330101342 + ... + 330101345.

It is an arithmetic number, because the mean of its divisors is an integer number (495152016).

Almost surely, 2^1320405374 is an apocalyptic number.

1320405374 is a deficient number, since it is larger than the sum of its proper divisors (660202690).

1320405374 is an equidigital number, since it uses as much as digits as its factorization.

1320405374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660202689.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 1320405374 is about 36337.3825969896. The cubic root of 1320405374 is about 1097.0735918202.

The spelling of 1320405374 in words is "one billion, three hundred twenty million, four hundred five thousand, three hundred seventy-four".