10021457 has 2 divisors, whose sum is σ = 10021458. Its totient is φ = 10021456.

The previous prime is 10021439. The next prime is 10021469. The reversal of 10021457 is 75412001.

10021457 is nontrivially palindromic in base 3.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8473921 + 1547536 = 2911^2 + 1244^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021457 - 2⁶ = 10021393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10021157) 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 as a sum of consecutive naturals, namely, 5010728 + 5010729.

It is an arithmetic number, because the mean of its divisors is an integer number (5010729).

Almost surely, 2^10021457 is an apocalyptic number.

It is an amenable number.

10021457 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021457 is an equidigital number, since it uses as much as digits as its factorization.

10021457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 10021457 is about 3165.6684918039. The cubic root of 10021457 is about 215.5974512729.

Adding to 10021457 its reverse (75412001), we get a palindrome (85433458).

The spelling of 10021457 in words is "ten million, twenty-one thousand, four hundred fifty-seven".