1320121 has 4 divisors (see below), whose sum is σ = 1440144. Its totient is φ = 1200100.

The previous prime is 1320119. The next prime is 1320127. The reversal of 1320121 is 1210231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1320121 - 2¹ = 1320119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320098 and 1320107.

It is not an unprimeable number, because it can be changed into a prime (1320127) 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, 59995 + ... + 60016.

It is an arithmetic number, because the mean of its divisors is an integer number (360036).

2^1320121 is an apocalyptic number.

1320121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1320121 is a deficient number, since it is larger than the sum of its proper divisors (120023).

1320121 is a wasteful number, since it uses less digits than its factorization.

1320121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120022.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1320121 is about 1148.9651865918. The cubic root of 1320121 is about 109.6994827725.

Adding to 1320121 its reverse (1210231), we get a palindrome (2530352).

It can be divided in two parts, 1320 and 121, that added together give a palindrome (1441).

The spelling of 1320121 in words is "one million, three hundred twenty thousand, one hundred twenty-one".