10021345 has 4 divisors (see below), whose sum is σ = 12025620. Its totient is φ = 8017072.

The previous prime is 10021331. The next prime is 10021357. The reversal of 10021345 is 54312001.

10021345 is digitally balanced in base 2, 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.

It can be written as a sum of positive squares in 2 ways, for example, as 2876416 + 7144929 = 1696^2 + 2673^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021345 - 2⁷ = 10021217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1002130 + ... + 1002139.

It is an arithmetic number, because the mean of its divisors is an integer number (3006405).

Almost surely, 2^10021345 is an apocalyptic number.

It is an amenable number.

10021345 is a deficient number, since it is larger than the sum of its proper divisors (2004275).

10021345 is an equidigital number, since it uses as much as digits as its factorization.

10021345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004274.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 10021345 is about 3165.6508019679. The cubic root of 10021345 is about 215.5966480961.

Adding to 10021345 its reverse (54312001), we get a palindrome (64333346).

The spelling of 10021345 in words is "ten million, twenty-one thousand, three hundred forty-five".