12700321 has 4 divisors (see below), whose sum is σ = 12874372. Its totient is φ = 12526272.

The previous prime is 12700273. The next prime is 12700327. The reversal of 12700321 is 12300721.

12700321 = T₅₅₃ + T₅₅₄ + ... + T₆₂₅.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12300721 = 1039 ⋅11839.

It can be written as a sum of positive squares in 2 ways, for example, as 7700625 + 4999696 = 2775^2 + 2236^2 .

It is a cyclic number.

It is not a de Polignac number, because 12700321 - 2¹³ = 12692129 is a prime.

It is a super-2 number, since 2×12700321² = 322596307006082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12700295 and 12700304.

It is not an unprimeable number, because it can be changed into a prime (12700327) 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, 86916 + ... + 87061.

It is an arithmetic number, because the mean of its divisors is an integer number (3218593).

Almost surely, 2^12700321 is an apocalyptic number.

It is an amenable number.

12700321 is a deficient number, since it is larger than the sum of its proper divisors (174051).

12700321 is an equidigital number, since it uses as much as digits as its factorization.

12700321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174050.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 12700321 is about 3563.7509733426. The cubic root of 12700321 is about 233.3126210640.

The spelling of 12700321 in words is "twelve million, seven hundred thousand, three hundred twenty-one".