12261505 has 8 divisors (see below), whose sum is σ = 15579432. Its totient is φ = 9232128.

The previous prime is 12261503. The next prime is 12261521. The reversal of 12261505 is 50516221.

It can be written as a sum of positive squares in 4 ways, for example, as 5875776 + 6385729 = 2424^2 + 2527^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12261505 - 2¹ = 12261503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12261503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72042 + ... + 72211.

It is an arithmetic number, because the mean of its divisors is an integer number (1947429).

Almost surely, 2^12261505 is an apocalyptic number.

It is an amenable number.

12261505 is a deficient number, since it is larger than the sum of its proper divisors (3317927).

12261505 is a wasteful number, since it uses less digits than its factorization.

12261505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144275.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 12261505 is about 3501.6431857058. The cubic root of 12261505 is about 230.5939594634.

Adding to 12261505 its reverse (50516221), we get a palindrome (62777726).

The spelling of 12261505 in words is "twelve million, two hundred sixty-one thousand, five hundred five".