12261061 has 16 divisors (see below), whose sum is σ = 13392000. Its totient is φ = 11188800.

The previous prime is 12261059. The next prime is 12261077. The reversal of 12261061 is 16016221.

It is a 3-Lehmer number, since φ(12261061) divides (12261061-1)³.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 12261061 - 2¹ = 12261059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a deceptive number, since it divides R_12261060.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12261961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82215 + ... + 82363.

It is an arithmetic number, because the mean of its divisors is an integer number (837000).

It is a Poulet number, since it divides 2^12261060-1.

Almost surely, 2^12261061 is an apocalyptic number.

It is an amenable number.

12261061 is a deficient number, since it is larger than the sum of its proper divisors (1130939).

12261061 is a wasteful number, since it uses less digits than its factorization.

12261061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 12261061 is about 3501.5797863250. The cubic root of 12261061 is about 230.5911760924.

Adding to 12261061 its reverse (16016221), we get a palindrome (28277282).

The spelling of 12261061 in words is "twelve million, two hundred sixty-one thousand, sixty-one".