10651021 has 4 divisors (see below), whose sum is σ = 10910844. Its totient is φ = 10391200.

The previous prime is 10651013. The next prime is 10651051. The reversal of 10651021 is 12015601.

It is a happy number.

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 346921 + 10304100 = 589^2 + 3210^2 .

It is a cyclic number.

It is not a de Polignac number, because 10651021 - 2³ = 10651013 is a prime.

It is a super-2 number, since 2×10651021² = 226888496684882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10650986 and 10651004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10651051) 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, 129850 + ... + 129931.

It is an arithmetic number, because the mean of its divisors is an integer number (2727711).

Almost surely, 2^10651021 is an apocalyptic number.

It is an amenable number.

10651021 is a deficient number, since it is larger than the sum of its proper divisors (259823).

10651021 is an equidigital number, since it uses as much as digits as its factorization.

10651021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259822.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 10651021 is about 3263.5902009903. The cubic root of 10651021 is about 220.0208038178.

Adding to 10651021 its reverse (12015601), we get a palindrome (22666622).

The spelling of 10651021 in words is "ten million, six hundred fifty-one thousand, twenty-one".