1320807 has 4 divisors (see below), whose sum is σ = 1761080. Its totient is φ = 880536.

The previous prime is 1320799. The next prime is 1320811. The reversal of 1320807 is 7080231.

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

It is not a de Polignac number, because 1320807 - 2³ = 1320799 is a prime.

It is a super-2 number, since 2×1320807² = 3489062262498, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

1320807 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220132 + ... + 220137.

It is an arithmetic number, because the mean of its divisors is an integer number (440270).

2^1320807 is an apocalyptic number.

1320807 is a deficient number, since it is larger than the sum of its proper divisors (440273).

1320807 is an equidigital number, since it uses as much as digits as its factorization.

1320807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440272.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1320807 is about 1149.2636773169. The cubic root of 1320807 is about 109.7184812364.

The spelling of 1320807 in words is "one million, three hundred twenty thousand, eight hundred seven".