1320920 has 16 divisors (see below), whose sum is σ = 2972160. Its totient is φ = 528352.

The previous prime is 1320911. The next prime is 1320923. The reversal of 1320920 is 290231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16472 + ... + 16551.

It is an arithmetic number, because the mean of its divisors is an integer number (185760).

2^1320920 is an apocalyptic number.

1320920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320920 is an abundant number, since it is smaller than the sum of its proper divisors (1651240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1320920 is a wasteful number, since it uses less digits than its factorization.

1320920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33034 (or 33030 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1320920 is about 1149.3128381777. The cubic root of 1320920 is about 109.7216100899.

The spelling of 1320920 in words is "one million, three hundred twenty thousand, nine hundred twenty".