12081537 has 24 divisors (see below), whose sum is σ = 19405568. Its totient is φ = 7192800.

The previous prime is 12081533. The next prime is 12081539. The reversal of 12081537 is 73518021.

12081537 is a `hidden beast` number, since 120 + 8 + 1 + 537 = 666.

12081537 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12081537 - 2² = 12081533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12081537.

It is not an unprimeable number, because it can be changed into a prime (12081533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1962 + ... + 5292.

Almost surely, 2^12081537 is an apocalyptic number.

It is an amenable number.

12081537 is a deficient number, since it is larger than the sum of its proper divisors (7324031).

12081537 is a wasteful number, since it uses less digits than its factorization.

12081537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3381 (or 3378 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 12081537 is about 3475.8505433922. The cubic root of 12081537 is about 229.4602149554.

Adding to 12081537 its reverse (73518021), we get a palindrome (85599558).

The spelling of 12081537 in words is "twelve million, eighty-one thousand, five hundred thirty-seven".