12273561 has 12 divisors (see below), whose sum is σ = 17857840. Its totient is φ = 8122680.

The previous prime is 12273539. The next prime is 12273571. The reversal of 12273561 is 16537221.

It is a happy number.

It is not a de Polignac number, because 12273561 - 2⁶ = 12273497 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 (12273571) 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, 3655 + ... + 6156.

Almost surely, 2^12273561 is an apocalyptic number.

It is an amenable number.

12273561 is a deficient number, since it is larger than the sum of its proper divisors (5584279).

12273561 is a wasteful number, since it uses less digits than its factorization.

12273561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9956 (or 9953 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 12273561 is about 3503.3642402696. The cubic root of 12273561 is about 230.6695110950.

The spelling of 12273561 in words is "twelve million, two hundred seventy-three thousand, five hundred sixty-one".