1320375 has 32 divisors (see below), whose sum is σ = 2515968. Its totient is φ = 602400.

The previous prime is 1320353. The next prime is 1320377. The reversal of 1320375 is 5730231.

It is a happy number.

It is not a de Polignac number, because 1320375 - 2⁵ = 1320343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320377) 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 31 ways as a sum of consecutive naturals, for example, 2374 + ... + 2876.

It is an arithmetic number, because the mean of its divisors is an integer number (78624).

2^1320375 is an apocalyptic number.

1320375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1320375 is a deficient number, since it is larger than the sum of its proper divisors (1195593).

1320375 is an equidigital number, since it uses as much as digits as its factorization.

1320375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528 (or 518 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 1320375 is about 1149.0757155210. The cubic root of 1320375 is about 109.7065179563.

The spelling of 1320375 in words is "one million, three hundred twenty thousand, three hundred seventy-five".