12237561 has 40 divisors (see below), whose sum is σ = 21187584. Its totient is φ = 6894720.

The previous prime is 12237559. The next prime is 12237581. The reversal of 12237561 is 16573221.

It is a happy number.

It is not a de Polignac number, because 12237561 - 2¹ = 12237559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12237521) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 63976 + ... + 64166.

Almost surely, 2^12237561 is an apocalyptic number.

It is an amenable number.

12237561 is a deficient number, since it is larger than the sum of its proper divisors (8950023).

12237561 is a wasteful number, since it uses less digits than its factorization.

12237561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 314 counting only the distinct ones).

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

The square root of 12237561 is about 3498.2225486667. Note that the first 3 decimals coincide. The cubic root of 12237561 is about 230.4437620324.

The spelling of 12237561 in words is "twelve million, two hundred thirty-seven thousand, five hundred sixty-one".