16861241 has 4 divisors (see below), whose sum is σ = 17405184. Its totient is φ = 16317300.

The previous prime is 16861223. The next prime is 16861259. The reversal of 16861241 is 14216861.

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 an emirpimes, since its reverse is a distinct semiprime: 14216861 = 101 ⋅140761.

It is an interprime number because it is at equal distance from previous prime (16861223) and next prime (16861259).

It is a cyclic number.

It is not a de Polignac number, because 16861241 - 2¹⁸ = 16599097 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 (16861541) 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, 271925 + ... + 271986.

It is an arithmetic number, because the mean of its divisors is an integer number (4351296).

Almost surely, 2^16861241 is an apocalyptic number.

It is an amenable number.

16861241 is a deficient number, since it is larger than the sum of its proper divisors (543943).

16861241 is an equidigital number, since it uses as much as digits as its factorization.

16861241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543942.

The product of its digits is 2304, while the sum is 29.

The square root of 16861241 is about 4106.2441476366. The cubic root of 16861241 is about 256.4266617605.

The spelling of 16861241 in words is "sixteen million, eight hundred sixty-one thousand, two hundred forty-one".