10660421 has 4 divisors (see below), whose sum is σ = 10835244. Its totient is φ = 10485600.

The previous prime is 10660417. The next prime is 10660427. The reversal of 10660421 is 12406601.

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 330625 + 10329796 = 575^2 + 3214^2 .

It is a cyclic number.

It is not a de Polignac number, because 10660421 - 2² = 10660417 is a prime.

It is a super-2 number, since 2×10660421² = 227289151794482, 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 = 10660393 and 10660402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10660427) 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, 87320 + ... + 87441.

It is an arithmetic number, because the mean of its divisors is an integer number (2708811).

Almost surely, 2^10660421 is an apocalyptic number.

It is an amenable number.

10660421 is a deficient number, since it is larger than the sum of its proper divisors (174823).

10660421 is an equidigital number, since it uses as much as digits as its factorization.

10660421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174822.

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

The square root of 10660421 is about 3265.0300151760. The cubic root of 10660421 is about 220.0855108360.

The spelling of 10660421 in words is "ten million, six hundred sixty thousand, four hundred twenty-one".