16402241 has 4 divisors (see below), whose sum is σ = 16411392. Its totient is φ = 16393092.

The previous prime is 16402237. The next prime is 16402247. The reversal of 16402241 is 14220461.

16402241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14220461 = 47 ⋅302563.

It is a cyclic number.

It is not a de Polignac number, because 16402241 - 2² = 16402237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16402247) 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, 905 + ... + 5798.

It is an arithmetic number, because the mean of its divisors is an integer number (4102848).

Almost surely, 2^16402241 is an apocalyptic number.

It is an amenable number.

16402241 is a deficient number, since it is larger than the sum of its proper divisors (9151).

16402241 is an equidigital number, since it uses as much as digits as its factorization.

16402241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9150.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 16402241 is about 4049.9680245651. The cubic root of 16402241 is about 254.0783904612.

The spelling of 16402241 in words is "sixteen million, four hundred two thousand, two hundred forty-one".