10321645 has 4 divisors (see below), whose sum is σ = 12385980. Its totient is φ = 8257312.

The previous prime is 10321643. The next prime is 10321679. The reversal of 10321645 is 54612301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54612301 = 1531 ⋅35671.

It can be written as a sum of positive squares in 2 ways, for example, as 6135529 + 4186116 = 2477^2 + 2046^2 .

It is a cyclic number.

It is not a de Polignac number, because 10321645 - 2¹ = 10321643 is a prime.

It is a super-3 number, since 3×10321645³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10321643) 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 3 ways as a sum of consecutive naturals, for example, 1032160 + ... + 1032169.

It is an arithmetic number, because the mean of its divisors is an integer number (3096495).

Almost surely, 2^10321645 is an apocalyptic number.

It is an amenable number.

10321645 is a deficient number, since it is larger than the sum of its proper divisors (2064335).

10321645 is an equidigital number, since it uses as much as digits as its factorization.

10321645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064334.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 10321645 is about 3212.7317037064. The cubic root of 10321645 is about 217.7290140734.

Adding to 10321645 its reverse (54612301), we get a palindrome (64933946).

The spelling of 10321645 in words is "ten million, three hundred twenty-one thousand, six hundred forty-five".