16241421 has 16 divisors (see below), whose sum is σ = 25603200. Its totient is φ = 8960448.

The previous prime is 16241419. The next prime is 16241437. The reversal of 16241421 is 12414261.

It is a happy number.

It is not a de Polignac number, because 16241421 - 2¹ = 16241419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16241411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12726 + ... + 13943.

It is an arithmetic number, because the mean of its divisors is an integer number (1600200).

Almost surely, 2^16241421 is an apocalyptic number.

It is an amenable number.

16241421 is a deficient number, since it is larger than the sum of its proper divisors (9361779).

16241421 is a wasteful number, since it uses less digits than its factorization.

16241421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26708.

The product of its digits is 384, while the sum is 21.

The square root of 16241421 is about 4030.0646396801. The cubic root of 16241421 is about 253.2452692906.

Adding to 16241421 its reverse (12414261), we get a palindrome (28655682).

The spelling of 16241421 in words is "sixteen million, two hundred forty-one thousand, four hundred twenty-one".