10021057 has 4 divisors (see below), whose sum is σ = 10058580. Its totient is φ = 9983536.

The previous prime is 10021051. The next prime is 10021061. The reversal of 10021057 is 75012001.

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 6195121 + 3825936 = 2489^2 + 1956^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021057 - 2³ = 10021049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10021057.

It is not an unprimeable number, because it can be changed into a prime (10021051) 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, 18358 + ... + 18895.

It is an arithmetic number, because the mean of its divisors is an integer number (2514645).

Almost surely, 2^10021057 is an apocalyptic number.

It is an amenable number.

10021057 is a deficient number, since it is larger than the sum of its proper divisors (37523).

10021057 is an equidigital number, since it uses as much as digits as its factorization.

10021057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37522.

The product of its (nonzero) digits is 70, while the sum is 16.

The square root of 10021057 is about 3165.6053133643. The cubic root of 10021057 is about 215.5945827569.

Adding to 10021057 its reverse (75012001), we get a palindrome (85033058).

The spelling of 10021057 in words is "ten million, twenty-one thousand, fifty-seven".