1320145 has 4 divisors (see below), whose sum is σ = 1584180. Its totient is φ = 1056112.

The previous prime is 1320127. The next prime is 1320149. The reversal of 1320145 is 5410231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5410231 = 19 ⋅284749.

It can be written as a sum of positive squares in 2 ways, for example, as 221841 + 1098304 = 471^2 + 1048^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320145 - 2⁵ = 1320113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320149) 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, 132010 + ... + 132019.

It is an arithmetic number, because the mean of its divisors is an integer number (396045).

2^1320145 is an apocalyptic number.

It is an amenable number.

1320145 is a deficient number, since it is larger than the sum of its proper divisors (264035).

1320145 is an equidigital number, since it uses as much as digits as its factorization.

1320145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264034.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1320145 is about 1148.9756307250. The cubic root of 1320145 is about 109.7001475529.

Adding to 1320145 its reverse (5410231), we get a palindrome (6730376).

The spelling of 1320145 in words is "one million, three hundred twenty thousand, one hundred forty-five".