10646021 has 2 divisors, whose sum is σ = 10646022. Its totient is φ = 10646020.

The previous prime is 10646011. The next prime is 10646039. The reversal of 10646021 is 12064601.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10562500 + 83521 = 3250^2 + 289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10646021 is a prime.

It is a super-2 number, since 2×10646021² = 226675526264882, which contains 22 as substring.

It is a Chen prime.

It is equal to p₇₀₄₆₃₀ and since 10646021 and 704630 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 10645984 and 10646002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10646011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5323010 + 5323011.

It is an arithmetic number, because the mean of its divisors is an integer number (5323011).

Almost surely, 2^10646021 is an apocalyptic number.

It is an amenable number.

10646021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10646021 is an equidigital number, since it uses as much as digits as its factorization.

10646021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 10646021 is about 3262.8240835203. The cubic root of 10646021 is about 219.9863696790.

The spelling of 10646021 in words is "ten million, six hundred forty-six thousand, twenty-one".