10345421 has 4 divisors (see below), whose sum is σ = 10358844. Its totient is φ = 10332000.

The previous prime is 10345393. The next prime is 10345427. The reversal of 10345421 is 12454301.

10345421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12454301 = 131 ⋅95071.

It can be written as a sum of positive squares in 2 ways, for example, as 3189796 + 7155625 = 1786^2 + 2675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10345421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10345393 and 10345402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10345427) 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, 5480 + ... + 7121.

It is an arithmetic number, because the mean of its divisors is an integer number (2589711).

Almost surely, 2^10345421 is an apocalyptic number.

It is an amenable number.

10345421 is a deficient number, since it is larger than the sum of its proper divisors (13423).

10345421 is an equidigital number, since it uses as much as digits as its factorization.

10345421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13422.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 10345421 is about 3216.4298531135. The cubic root of 10345421 is about 217.8960661031.

Adding to 10345421 its reverse (12454301), we get a palindrome (22799722).

The spelling of 10345421 in words is "ten million, three hundred forty-five thousand, four hundred twenty-one".