16211261 has 16 divisors (see below), whose sum is σ = 18532800. Its totient is φ = 14044800.

The previous prime is 16211257. The next prime is 16211263.

16211261 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 16211261 - 2² = 16211257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16211263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28106 + ... + 28676.

It is an arithmetic number, because the mean of its divisors is an integer number (1158300).

Almost surely, 2^16211261 is an apocalyptic number.

16211261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16211261 is a deficient number, since it is larger than the sum of its proper divisors (2321539).

16211261 is a wasteful number, since it uses less digits than its factorization.

16211261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700.

The product of its digits is 144, while the sum is 20.

The square root of 16211261 is about 4026.3210254524. The cubic root of 16211261 is about 253.0884149940.

It can be divided in two parts, 1621 and 1261, that added together give a palindrome (2882).

The spelling of 16211261 in words is "sixteen million, two hundred eleven thousand, two hundred sixty-one".