14405421 has 8 divisors (see below), whose sum is σ = 19826944. Its totient is φ = 9293760.

The previous prime is 14405407. The next prime is 14405423. The reversal of 14405421 is 12450441.

It is a happy number.

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

It is not a de Polignac number, because 14405421 - 2¹¹ = 14403373 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 (14405423) 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, 77356 + ... + 77541.

It is an arithmetic number, because the mean of its divisors is an integer number (2478368).

Almost surely, 2^14405421 is an apocalyptic number.

It is an amenable number.

14405421 is a deficient number, since it is larger than the sum of its proper divisors (5421523).

14405421 is a wasteful number, since it uses less digits than its factorization.

14405421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154931.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 14405421 is about 3795.4474044571. The cubic root of 14405421 is about 243.3186052678.

Adding to 14405421 its reverse (12450441), we get a palindrome (26855862).

The spelling of 14405421 in words is "fourteen million, four hundred five thousand, four hundred twenty-one".