16236641 has 4 divisors (see below), whose sum is σ = 16244784. Its totient is φ = 16228500.

The previous prime is 16236637. The next prime is 16236677. The reversal of 16236641 is 14663261.

It is a happy number.

16236641 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: 14663261 = 191 ⋅76771.

It is a cyclic number.

It is not a de Polignac number, because 16236641 - 2² = 16236637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16236691) 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, 1166 + ... + 5816.

It is an arithmetic number, because the mean of its divisors is an integer number (4061196).

Almost surely, 2^16236641 is an apocalyptic number.

It is an amenable number.

16236641 is a deficient number, since it is larger than the sum of its proper divisors (8143).

16236641 is an equidigital number, since it uses as much as digits as its factorization.

16236641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8142.

The product of its digits is 5184, while the sum is 29.

The square root of 16236641 is about 4029.4715534422. The cubic root of 16236641 is about 253.2204227134.

The spelling of 16236641 in words is "sixteen million, two hundred thirty-six thousand, six hundred forty-one".