12320355 has 16 divisors (see below), whose sum is σ = 19837440. Its totient is φ = 6529248.

The previous prime is 12320351. The next prime is 12320369. The reversal of 12320355 is 55302321.

It is not a de Polignac number, because 12320355 - 2² = 12320351 is a prime.

It is a super-2 number, since 2×12320355² = 303582294652050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12320351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75 + ... + 4964.

It is an arithmetic number, because the mean of its divisors is an integer number (1239840).

Almost surely, 2^12320355 is an apocalyptic number.

12320355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12320355 is a deficient number, since it is larger than the sum of its proper divisors (7517085).

12320355 is a wasteful number, since it uses less digits than its factorization.

12320355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5210.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 12320355 is about 3510.0363245984. The cubic root of 12320355 is about 230.9622884035.

Adding to 12320355 its reverse (55302321), we get a palindrome (67622676).

The spelling of 12320355 in words is "twelve million, three hundred twenty thousand, three hundred fifty-five".