16041421 has 16 divisors (see below), whose sum is σ = 18722880. Its totient is φ = 13582080.

The previous prime is 16041407. The next prime is 16041427. The reversal of 16041421 is 12414061.

It is a cyclic number.

It is not a de Polignac number, because 16041421 - 2⁹ = 16040909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16041427) 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, 19990 + ... + 20776.

It is an arithmetic number, because the mean of its divisors is an integer number (1170180).

Almost surely, 2^16041421 is an apocalyptic number.

16041421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16041421 is a deficient number, since it is larger than the sum of its proper divisors (2681459).

16041421 is a wasteful number, since it uses less digits than its factorization.

16041421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 16041421 is about 4005.1742783554. The cubic root of 16041421 is about 252.2014692297.

Adding to 16041421 its reverse (12414061), we get a palindrome (28455482).

It can be divided in two parts, 1604 and 1421, that added together give a square (3025 = 55²).

The spelling of 16041421 in words is "sixteen million, forty-one thousand, four hundred twenty-one".