11649421 has 8 divisors (see below), whose sum is σ = 13336064. Its totient is φ = 9968400.

The previous prime is 11649401. The next prime is 11649439. The reversal of 11649421 is 12494611.

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 11649421 - 2⁵ = 11649389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11649421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11649401) 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 in 7 ways as a sum of consecutive naturals, for example, 4996 + ... + 6946.

It is an arithmetic number, because the mean of its divisors is an integer number (1667008).

Almost surely, 2^11649421 is an apocalyptic number.

It is an amenable number.

11649421 is a deficient number, since it is larger than the sum of its proper divisors (1686643).

11649421 is an equidigital number, since it uses as much as digits as its factorization.

11649421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2811.

The product of its digits is 1728, while the sum is 28.

The square root of 11649421 is about 3413.1248145944. The cubic root of 11649421 is about 226.6912619889.

It can be divided in two parts, 1164 and 9421, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 11649421 in words is "eleven million, six hundred forty-nine thousand, four hundred twenty-one".