11687421 has 8 divisors (see below), whose sum is σ = 15599200. Its totient is φ = 7783632.

The previous prime is 11687407. The next prime is 11687441. The reversal of 11687421 is 12478611.

11687421 is digitally balanced in base 3, because in such base 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 not a de Polignac number, because 11687421 - 2⁷ = 11687293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11687441) 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, 3951 + ... + 6243.

It is an arithmetic number, because the mean of its divisors is an integer number (1949900).

Almost surely, 2^11687421 is an apocalyptic number.

It is an amenable number.

11687421 is a deficient number, since it is larger than the sum of its proper divisors (3911779).

11687421 is a wasteful number, since it uses less digits than its factorization.

11687421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3995.

The product of its digits is 2688, while the sum is 30.

The square root of 11687421 is about 3418.6870286705. The cubic root of 11687421 is about 226.9374807613.

The spelling of 11687421 in words is "eleven million, six hundred eighty-seven thousand, four hundred twenty-one".