16421741 has 4 divisors (see below), whose sum is σ = 18767712. Its totient is φ = 14075772.

The previous prime is 16421731. The next prime is 16421773. The reversal of 16421741 is 14712461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16421741 - 2¹⁸ = 16159597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16421741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16421731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1172975 + ... + 1172988.

It is an arithmetic number, because the mean of its divisors is an integer number (4691928).

Almost surely, 2^16421741 is an apocalyptic number.

It is an amenable number.

16421741 is a deficient number, since it is larger than the sum of its proper divisors (2345971).

16421741 is an equidigital number, since it uses as much as digits as its factorization.

16421741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345970.

The product of its digits is 1344, while the sum is 26.

The square root of 16421741 is about 4052.3747358802. The cubic root of 16421741 is about 254.1790386286.

The spelling of 16421741 in words is "sixteen million, four hundred twenty-one thousand, seven hundred forty-one".