10021145 has 8 divisors (see below), whose sum is σ = 12043080. Its totient is φ = 8005120.

The previous prime is 10021129. The next prime is 10021147. The reversal of 10021145 is 54112001.

10021145 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1471369 + 8549776 = 1213^2 + 2924^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10021145 - 2⁴ = 10021129 is a prime.

It is a super-2 number, since 2×10021145² = 200846694222050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10021147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4361 + ... + 6249.

It is an arithmetic number, because the mean of its divisors is an integer number (1505385).

Almost surely, 2^10021145 is an apocalyptic number.

It is an amenable number.

10021145 is a deficient number, since it is larger than the sum of its proper divisors (2021935).

10021145 is a wasteful number, since it uses less digits than its factorization.

10021145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2955.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 10021145 is about 3165.6192127292. The cubic root of 10021145 is about 215.5952138370.

Adding to 10021145 its reverse (54112001), we get a palindrome (64133146).

The spelling of 10021145 in words is "ten million, twenty-one thousand, one hundred forty-five".