12540032 has 24 divisors (see below), whose sum is σ = 25062165. Its totient is φ = 6249984.

The previous prime is 12539993. The next prime is 12540041. The reversal of 12540032 is 23004521.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 7268416 + 5271616 = 2696^2 + 2296^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2504.

It is a super-2 number, since 2×12540032² = 314504805122048, which contains 22 as substring.

It is a Duffinian number.

12540032 is a Rhonda number in base 6.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 39908 + ... + 40220.

Almost surely, 2^12540032 is an apocalyptic number.

It is an amenable number.

12540032 is a deficient number, since it is larger than the sum of its proper divisors (12522133).

12540032 is an frugal number, since it uses more digits than its factorization.

12540032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 12540032 is about 3541.1907601822. The cubic root of 12540032 is about 232.3269271183.

Adding to 12540032 its reverse (23004521), we get a palindrome (35544553).

The spelling of 12540032 in words is "twelve million, five hundred forty thousand, thirty-two".