11660421 has 8 divisors (see below), whose sum is σ = 15734880. Its totient is φ = 7679792.

The previous prime is 11660413. The next prime is 11660443. The reversal of 11660421 is 12406611.

11660421 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11660421 - 2³ = 11660413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11660491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23166 + ... + 23663.

It is an arithmetic number, because the mean of its divisors is an integer number (1966860).

Almost surely, 2^11660421 is an apocalyptic number.

It is an amenable number.

11660421 is a deficient number, since it is larger than the sum of its proper divisors (4074459).

11660421 is an equidigital number, since it uses as much as digits as its factorization.

11660421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46915.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 11660421 is about 3414.7358609415. The cubic root of 11660421 is about 226.7625908395.

The spelling of 11660421 in words is "eleven million, six hundred sixty thousand, four hundred twenty-one".