16191261 has 12 divisors (see below), whose sum is σ = 23512320. Its totient is φ = 10736520.

The previous prime is 16191247. The next prime is 16191271. The reversal of 16191261 is 16219161.

It is not a de Polignac number, because 16191261 - 2¹¹ = 16189213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16191271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2991 + ... + 6428.

It is an arithmetic number, because the mean of its divisors is an integer number (1959360).

Almost surely, 2^16191261 is an apocalyptic number.

It is an amenable number.

16191261 is a deficient number, since it is larger than the sum of its proper divisors (7321059).

16191261 is a wasteful number, since it uses less digits than its factorization.

16191261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9616 (or 9613 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 16191261 is about 4023.8366020503. The cubic root of 16191261 is about 252.9842929002.

The spelling of 16191261 in words is "sixteen million, one hundred ninety-one thousand, two hundred sixty-one".